Rep. Roscoe Bartlett’s reelection campaign is up with a new television ad, three weeks before he faces a challenge in the Republican primary.

Bartlett’s district was redrawn following the 2010 Census to include a swath of new territory in western Montgomery County, and state Sen. David Brinkley (Frederick), Del. Kathy Afzali (Frederick) and five other candidates are challenging him for the GOP nomination.

Bartlett’s campaign launched its first television ad of the primary Wednesday, calling him a “citizen-legislator” and hitting a series of conservative themes — fiscal discipline, a balanced budget amendment and an end to automatic pay raises for members of Congress.

Brinkley, meanwhile, released a new radio ad Wednesday featuring state Sen. Chris Shank (R-Hagerstown), who had been rumored as a candidate to take on Bartlett himself but chose to back Brinkley instead. Shank says he’s backing Brinkley because he’s “a true conservative and effective leader,” and “Washington has a problem that Congressman Bartlett has not been able to fix.”

The winner of the Republican nomination is likely to face a difficult general election contest. Democrats have a tough primary contest of their own underway