The Democratic Congressional Campaign Committee will begin running radio ads next week in the districts of six Republicans, all of whom voted against the economic recovery package. One of the six targeted districts, though, sticks out from the rest.

Rep. Michael McCaul (R-Texas), whose 10th District runs from the Houston suburbs west to include parts of Austin, is the only one of the six targeted members to represent a district won by John McCain in 2008. Both McCaul and McCain won the district by 11 points in November, which begs the question: Is the DCCC really targeting this seat?

Apparently they are, and in no small part because of an already well-funded candidate named Jack McDonald, whose exploratory committee announced yesterday that it had raised more than $300,000 in just five weeks. Should McDonald, a self-described "centrist Democrat" and "successful businessman," officially jump in the race, he'll face a Republican whose winning percentage has dropped significantly as his opponents have spent more money, but who held off a well-funded opponent last year.

McCaul was elected comfortably to Congress with 79 percent in 2004, when no Democrat ran in the general election and two third-party candidates spent no more than $50,000 combined. McCaul's Dem opponent in 2006 spent a paltry $64,000, yet still garnered 40 percent of the vote. And McCaul's percentage dropped to 55 percent.

In 2008, a DailyKos/Research2000 poll released late in the campaign found Democrat Larry Joe Doherty trailing McCaul by just 4 points. Doherty spent $1.2 million, about a half-million less than McCaul, and the Republican's winning percentage dropped to 54 percent, below the threshold of what should be considered a solid victory.

The other five Republican congressmen the DCCC is targeting in radio ads next week include: Mike Castle (Delaware), Ken Calvert (CA-44), Charlie Dent (PA-15), Thaddeus McCotter (MI-11) and Bill Young (FL-10).

"Heading into Tax Day, we are again going district by district to hold 'just say no' House Republicans accountable for voting against middle class tax cuts that would immediately help ease the economic crisis for families struggling to make ends meet," said DCCC Chairman Chris Van Hollen.

The committee is calling this the fourth phase of its "Putting Families First" campaign, with the ads set to begin airing Monday morning and run for a week. The ad can be heard here: