6 states are voting today. Here's how to stay on top of it all.
Senate primaries in Nebraska and Mississippi and the GOP primary in Florida's 13th special election debut on the list.
Meet the top-two primary system.
A handful of incumbents have already been put on notice for 2014. But defeating a sitting senator in a primary is no small feat.
While Graham is Obama's most vocal critic on Libya, he's set to become perhaps his most important ally on immigration -- all while hoping to avoid a tough primary in 2014.
The matchup is expected to be one of the top governor's races in the country.
The former Providence mayor still faces a tough general election matchup, despite his heavily blue district.
The freshman appears likely to survive his primary tonight. But he's got plenty of work to do in the general election, despite his heavily Democratic district.
The Kennedy family is one step closer to returning one of its own to Congress.