All of Louisiana's incumbent congressmen signed up for their re-election bids on the opening day of qualifying.
The most heated congressional race is expected between two Republican incumbents forced into the same district. Reps. Charles Boustany of Lafayette and Jeff Landry of New Iberia are battling for a reconfigured 3rd District because Louisiana's population didn't grow enough to hold on to seven congressional seats.
Candidates must file paperwork and pay their fees by Friday if they want to run in the Nov. 6 election.
Rep. Darrell Issa, R-Calif., chairman of the House oversight committee, made news recently for going after the Justice Department's botched gun operation, known as Fast and Furious. Here, Issa listens during Attorney General Eric Holder's testimony in February.
The man driving the investigation into the General Services Administration, California Republican Rep. Darrell Issa, took the top seat on the House Oversight and Government Reform Committee after the GOP won a majority in 2010.
Issa has led several splashy investigations since. But he's also been dogged by allegations of his own.
Issa has made news in recent months by threatening to subpoena Attorney General Eric Holder, and by calling a panel of only men to talk about women's contraception.