Radtke begins airing radio ads across Virginia U.S. Senate hopeful Jamie Radtke has hit the airwaves. Radtke, who is in an uphill battle for the Republican nomination for U.S. Senate, has begin airing ads attacking rival George Allen. The tea party activist has been by far the most outspoken against Allen, trying to label him a big spender who did not challenge the status quo in his term in the U.S. Senate. "George Allen is a risky choice and an election disaster waiting to happen,"" the narrator says. "And this is one election we can't afford to lose."" Radtke said the ad, running statewide during morning commutes and on the shows of conservative hosts Rush Limbaugh, Sean Hannity and Glenn Beck, will air through the June 12 primary. Bishop E.W. Jackson and Del. Robert G. Marshall (R-Prince William) are also vying for the nomination. The four will meet for their final debate Friday in Northern Virginia. A Washington Post poll released recently showed Allen with 62 percent of the vote among likely GOP primary voters. An Allen spokeswoman did not immediately respond to a request for comment.