U.S. Sen. Pat Roberts released a TV attack ad Monday, questioning his Republican primary challenger Milton Wolf‘s qualifications to hold office after posting graphic X-ray images and other personal information about gunshot victims on a Facebook page.

The ad, which is based on news reports in February, repeats a quote in those stories from John Carney, president of the Center for Practical Bioethics in Kansas City, Mo., who called Wolf’s behavior “beyond alarming for a professional in the field of medicine.”

“If Milton Wolf is so irresponsible as a doctor, how could he possibly be trusted as a U.S. senator?” the ad concludes.

Wolf, a radiologist from Johnson County, later apologized for posting the material and said it had been removed from the Facebook page.

Wolf’s campaign manager, Ben Hartman, immediately fired back at the ad.

“Pat Roberts has been in Washington for 47 years and the fact that he can’t articulate a single reason why he should be sent back is the very reason he will be defeated on August 5th,” Hartman said in an email. “Roberts’ entire campaign has been a Washington style personal attack on Dr. Wolf.”

But the ad appeared to be part of a new, more aggressive strategy by the Roberts campaign. It comes on the heels of a June 24 “Memo to the Media” from Roberts’ campaign manager Leroy Towns who said Wolf’s “ethical problems have discredited his campaign.” Roberts has also launched a separate website on tumblr.com entitled The Real Milton Wolf, which links to other news stories critical of Wolf.

Wolf has backing from the Tea Party Express as well as the Senate Conservatives Fund, both of which have campaigned to unseat long-term incumbent Republicans from Congress.

Both of those groups also backed an unsuccessful challenge by Mississippi Republican Chris McDaniel to unseat U.S. Sen. Thad Cochran earlier this month. Following that primary, Wolf announced that he had reserved $250,000 worth of TV time for his own ads. Today, he also launched a radio ad Monday, again hammering Roberts on the Kansas residency issue.

A distant cousin of President Barack Obama, he began his campaign focusing on his opposition to the president’s signature health care law, the Affordable Care Act, also known as Obamacare.

But his campaign has also been characterized by its daily barrage of attacks against Roberts, whom Wolf blames for having supported former Kansas Gov. Kathleen Sebelius to become secretary of Health and Human Services, where she was Obama’s chief advocate for health reform.

He has also challenged whether Roberts is really a Kansas resident because he owns a home in Virginia and reportedly pays rent to a supporter in Dodge City so he can declare that home as his address for voting purposes. And in recent weeks, he has launched an almost-daily barrage of attacks criticizing Roberts for refusing to debate him.

A recent poll by SurveyUSA, commissioned by KSN-TV in Wichita, showed Roberts with a comfortable lead in the race, 56-23 percent. The primary election is four weeks away, on Aug. 5.