The U.S. Chamber of Commerce announced its support on Wednesday for a Democratic incumbent in Congress.

The business group, which has allied itself with Republicans more often than Democrats on major legislative initiatives this Congress, backed Rep. Dan Boren (D-Okla.) for reelection.

“We’re endorsing Dan Boren because he has a record of standing up for the people of Oklahoma in these challenging economic times,” Chamber VP and political director Bill Miller said in a statement. “As a leader of the Blue Dog Democrats, he is an invaluable lawmaker who has a common sense approach to job creation and getting America back on the road to recovery."

Boren's been one of the most conservative lawmakers of the centrist Blue Dog coalition in the House, breaking with his party on healthcare, climate legislation and a whole host of other issues.

The Chamber has vowed to spend big in this year's elections on behalf of their agenda this fall.