Bob Barr will not seek a return trip to the U.S. House.
The Georgia congressman had been weighing whether to challenge U.S. Rep. Tom Graves in a newly-drawn congressional district in northwest Georgia.
Barr said Tuesday that after giving the matter serious thought he concluded he is "not in a position to leave my law practice for the full-time rigors of a campaign, without potentially causing our firm lasting harm. "
A fiery former federal prosecutor, Barr was the first lawmaker to call for President Bill Clinton's resignation over the Monica Lewinsky scandal and was one of the House prosecutors who pressed the impeachment case in the Senate. In 2008, he ran for president as a Libertarian.
Graves is tea party favorite first elected to the U.S. House in 2010.