It's primary day in several states, and although the mid-term congressional elections are more than two months away both parties are fighting for every seat.
Three Washington insiders will try to hold their own Tuesday in key primaries around the country.
In Arizona, republican Senator John McCain is in the political fight of his life against former congressman J.D. Hayworth. The two have sparred over congressional spending and the state's controversial immigration law.
In Florida's democratic senate primary, the two top contenders have spent millions of their own money getting personal, running ads like "how corrupt is Congressman Kendrick Meek?" and "profiting off of suffering – Jeff Greene."
Polls show Congressman Meek currently in the lead over real-estate billionaire Greene. But the winner will have some stiff competition this fall: Republican Marco Rubio and independent Governor Charlie Crist who ditched the GOP earlier this year.
At stake is control of Congress and the Obama Administration's legislative agenda. Republicans can regain control in the Senate if they sweep all 10 competitive races in November. They need 39 seats to win the House.
Alaska's GOP senate primary will offer another test of "Tea Party" power. Republican Senator Lisa Murkowski is squaring off against Sarah Palin-backed Joe Miller.
"Democrats have more money, and they are going to spend more on these races, and that's how they are going to try to save them, but I think republicans have momentum,” said Nathan Gonzales of Rothenberg Political Report.
But it may be swing voters who'll determine the ultimate outcome in November.