Republican primary voters in Delaware faced a much-hyped choice at the polls yesterday, and ultimately voted for Tea Party-endorsed Christine O'Donnell over moderate long-term Delaware Rep. Mike Castle. The state Republican party campaigned hard against O’Donnell, saying she is likely to lose against a Democrat in the general election. The outcome could have big consequences for which party will occupy Vice President Biden’s place in the Senate.

Our political coverage of the midterms turns to Florida. The Sunshine State has been in the international limelight for weeks, following Pastor Terry Jones’ threats to publicly burn Korans. With the bonfire cancelled and the 9/11 anniversary past, we talk this morning about a state full of voters whose opinions range the gamut on the Koran burning issue and the three-way race for U.S. Senate that’s been heating up for months. 

As one of the last states to hold primary elections, Delaware has been the focus of a lot of national political attention. In a recent interview with Fox's Sean Hannity, Sarah Palin flexed her political clout and officially endorsed Tea Party Express-backed candidate Christine O’Donnell.  But what does a Palin endorsement mean for GOP Rep. Mike Castle, the veteran Congressman and former Delaware governor, as he bids for the same senate nomination? 

Voters will be heading to the polls to cast their votes in Arizona's primaries tomorrow. We'll finally get a look at how voters feel about Gov. Jan Brewer as she seeks re-election. The governor has been closely watched since she signed the controversial immigration bill, SB-1070 into law. After she signed the immigration bill, her poll numbers sky-rocketed, according to Mark Brodie, reporter and host at KJZZ in Arizona. And he does not see this primary being a problem for her. He also does not predict any problems for Sen. John McCain, who will likely face his toughest challenge on the road to re-election.

On Tuesday, Florida's voters head to the polls to vote in primaries for U.S. Senate and governor. Sergio Bustos, state politics editor at The Miami Herald, and Kate Zernike, reporter for our partner The New York Times, describe how the races have been shaping up and what we can expect on Tuesday. Plus, we'll find out what the Sunshine State can tell us about the national political mood.

The midterm elections are fast-approaching and many of the races are shaping up to be neck-and-neck. The Republicans have to gain 39 seats in the House and ten in the Senate in order to win majorities in both. But with public turnout for midterms usually very low, how much can these elections (or the campaigns leading up to them) help us predict the country's political future?

Voters in Colorado and Connecticut head to the polls today to vote in primary elections. In Colorado, incumbent Democratic Senator Michael Bennet, who was endorsed by President Obama, is facing a surprisingly hard primary battle. A loss could bring insight into how voters feel about Washington and President Obama. Kirk Johnson, Denver bureau chief for The New York Times, joins us with the latest from the Centennial State.

It may seem like a distant memory, but back in 2008, the story of the Democratic presidential primary was the rise of a relative newcomer to Washington taking on the party establishment with grassroots organizing. It was a winning strategy for then-candidate Barack Obama in Colorado, where he earned more than two-thirds of the primary votes and defeated Hillary Clinton. 

In Colorado’s Democratic Senate primary this year, there’s another candidate campaigning as an outsider, but the establishment narrative is flipped. This time, the political newcomer is the incumbent, and the challenger is a mainstay of Colorado politics.

Ahead of today's primary elections, politicians in Georgia tried to overcome voter apathy with increasingly pointed advertisements and anti-incumbent rhetoric.  

With all of the attention poured on California's primaries for Senate and governor, you may have missed an even bigger vote that passed in the Sunshine State: 54 percent of California voters passed Proposition 14. Known as “the open-primary initiative,” Prop 14 will essentially do away with party-specific primaries, starting with the 2012 elections. All political candidates will run in a single primary; the two who receive the most votes will run against each other in the general election.

For the first time in U.S. history, women are now the majority of the workforce. They also get more college degrees than men, and two prominent women just won the Republican primary for U.S. Senate and governor in California, Carly Fiorina and Meg Whitman, powerful businesswomen who turned to politics beat out male challengers. Women won elsewhere as well - in Iowa, Nevada, Arkansas and South Carolina. 

Last night, voters decided the party candidates in four closely watched states: Arkansas, California, Nevada, and South Carolina and seven others. But for many candidates the election battle is only just beginning. Takeaway Washington correspondent Todd Zwillich looks at how the primary winners will fare in November's ballot. Sharron Angle's win in Nevada is both a victory for the Tea Party and for Harry Reid, who has been preparing to face-off against the conservative candidate.

Primary races are scheduled in eleven states today. We are looking at two elections with national implications: Arkansas, where the power of organized labor is at play, and Nevada, where Senate Majority Leader Harry Reid is hoping a specific GOP pick will enable him to keep his seat. 

In Arkansas, Democratic Senator Blanche Lincoln is facing a run-off against Lt. Gov. Bill Halter. Organized labor groups, both local and national, have thrown their weight behind Halter, saying Lincoln betrayed them by not supporting a public option in health care reform and by voting for NAFTA as a U.S. Representative, in 1993. National labor groups have pumped millions of dollars into the race - leading some analysts to suggest that Arkansas' primary contest has been hijacked by national interests.

Tomorrow, California asks voters if they want to end partisan primaries. If Proposition 14 passes, all registered voters would be able to vote in the primary for any candidate, regardless of party affiliation. Then the two top vote-getters would square off in the November election.

We're asking for your suggestions: How would you change the primary system?

This week is all about "angst," says Takeaway economics editor Charles Hermann. Politically, it's about "watching the women," says Takeaway Washington correspondent Todd Zwillich. Those are the terms setting the agenda for this week, as we look ahead at news on the economic impact of the oil spill and whether anti-incumbent fever will affect Tuesday's primary elections.

A week after allegations that the White House offered Rep. Joe Sestak a job to dissuade him from challenging Arlen Specter in the Pennsylvania Democratic Senate primary, the Obama administration has confirmed that it also offered a position to another incumbent challenger, Andrew Romanoff of Colorado. Romanoff, the former speaker of the Colorado House of Representatives, who is challenging incumbent Democrat Michael Bennet in a primary race for Senate, said Wednesday that he was suggested a position in the administration in order to get him to drop out of the primary. 

We analyze the results of Alabama's most hotly contested primaries: from the races of Rep. Parker Griffith who switched parties to become a Republican in 2009, to Democratic Rep. Artur Davis, who was attempting to become the state's first African American nominee to governor, to two candidates who saw their fortunes rise with some particularly colorful campaign ads. Pat Duggins, News Director for Alabama Public Radio, fills us in on Alabama's primary results and their significance.

In yesterday's primary, Pennsylvania Senator Arlen Specter lost to the more liberal candidate, Rep. Joe Sestak. This anti-incumbent fever has been well documented across the country and the question is, what will it mean for sitting Senators and Congressmen? We put that quetion to Sen. Bob Casey Jr., a moderate Democrat from Pennsylvania who has been watching the race closely.

A year ago Pennsylvania Senator Arlen Specter quit the Republican party to join the Democrats. He won the support of President Obama, organized labor and Pennsylvania Governor Ed Rendell. But he lacked the support of the voters and lost yesterday's primary to Rep. Joe Sestak. 

To many political strategists, pundits and observers, the results of yesterday’s primary elections may offer key insights to voter behavior in November’s midterm elections. Did yesterday’s results challenge the popular notion that the 2010 elections will be a correction to the Democratic majority in both the House and the Senate? Or was there even bigger surprises in the form of viable, Tea Party candidate?