WASHINGTON - It's a tough time to be a moderate in Congress.
Just two years removed from being one of Capitol Hill's most powerful voting blocs, centrist Democrats like U.S. Rep. Collin Peterson are now something of an afterthought.
In the early years of President Obama's administration, members of the Blue Dog Coalition, a conservative Democratic caucus, were among the most influential in the House. Leaders from both parties coveted their swing votes on legislation ranging from federal health care to budget bills.
Now the Blue Dogs' bark has become more of a whimper. Political forces have decimated their ranks and influence, leaving just 15 members of a pack that once stood more than 50 strong.
"No one is asking us anything," Peterson said. "We've been marginalized."
Peterson cruised to re-election last month with more than 60 percent of the vote in a conservative-leaning district, but many of his Blue Dog compatriots were less fortunate. Once-a-decade redistricting left some vulnerable to partisan challengers. Several veteran members lost primaries to more-liberal Democrats. Others opted to retire rather than face uphill re-election battles.
As Peterson begins his 12th term in Congress next year, experts say he and his ilk face a fight for relevance in what could be the most polarized Congress in recent memory.
"I don't think there is a rebound for them," said Calvin Jillson, a political science professor at Southern Methodist University in Dallas.