With Sen. Max Baucus (D-Mont.) opting not to run for reelection in 2014, all eyes turned Tuesday to former governor Brian Schweitzer (D), who sources said would be a likely option to run for Baucus's seat.

A person familiar with Schweitzer's thinking tells Post Politics that the Democrat is leaning toward running. There had been chatter that the bolo tie-wearing former governor, who left office earlier this year after two terms, might even challenge Baucus in the primary. He also is viewed as a dark horse 2016 presidential candidate, though few voters outside his home state know much about Schweitzer.