Colorado: Wil Armstrong

Sixth Congressional District Republican candidate Mike Coffman's campaign filed a complaint Thursday with the Federal Election Commission that seeks to force a 501(c)4 group to disclose who paid for an anti-Coffman mailer sent out under the group's name.

Some 6th Congressional District Republican primary campaigns have commissioned pollsters to survey how the race is playing out.

But Steve Ward's campaign prefers to poll 6th District voters the old-fashioned way: by going door-to-door themselves and asking them.

Ward and about 90 campaign canvassers have talked to about 2,400 6th District residents (out of about 10,000 houses hit in total) from around the district since the state senator from Littleton began campaigning in March.

The chairman of the 501(c)4 group Protect Colorado Jobs sent out an unauthorized mailer this week to 50,000 CO-6 Republican voters using the group's name to attack Republican candidate Mike Coffman.

Two supporters of Coffman primary opponent Wil Armstrong gave $15,000 to the chairman, political consultant Curt Cerveny, to produce the piece, according to a source knowledgable about the situation. The source did not provide the names of the two donors.

Sixth Congressional District Republican candidate Wil Armstrong picked up his most high-profile supporter to date on Tuesday, winning the endorsement of former Massachusetts Gov. and possible VP candidate Mitt Romney.

"Washington is broken and Wil Armstrong is the best man to fix it," Romney said in a statement.