Sen. John McCainJohn McCainBush biographer: Trump has moved the goalpost for civilized society White House to pressure McConnell on ObamaCare McCain: Trump needs to state difference between bigots and those fighting hate MORE (R-Ariz.) began airing his second TV ad to focus on the proposed Woodstock museum Friday in New Hampshire.

Earlier this week McCain began airing an ad in which he criticizes Sen. Hillary Rodham Clinton's (D-N.Y.) support for a federally funded Woodstock museum in upstate New York.

The second ad leads with a narrator calling Woodstock "a cultural event that defined a generation" before discussing the museum's cost, whereas the first ad featured McCain calling the concert a "pharmaceutical event" in the Oct. 21 GOP debate.