Chairman of the House Veterans Affairs Committee Jeff MillerJefferson (Jeff) Bingham MillerTime is now for VA Accountability Act GOP chairman: VA faces 'enormous challenges' one year after scandal House passes bill to rescind VA bonuses MORE (R-Fla.) said Wednesday it was not appropriate for conservative group Crossroads GPS to use the Veterans Affairs controversy in ads.

In an interview on CNN, host Jake Tapper played a new ad from the group attacking Sen. Mark Begich (D-Alaska), whom it accuses of not doing enough to fix mounting problems within the VA system.

"A national disgrace. Veterans died waiting for care that never came. Sen. Mark Begich sits on the Veterans' Affairs Committee. His response? If there's a problem, they need to fix it. If there's a problem?" says the ad's narrator.

Asked if the ad was "appropriate," Miller said, “No, I wouldn't use anything like that politically.”

“This is a bipartisan issue,” he added. “We're talking about Americans, people that have worn the uniform. It should not be a political football. And we on the House side have not done that.” 

Crossroads GPS is not alone in using the ongoing scandal at the Veterans Affairs Department to criticize Democrats.

The National Republican Congressional Committee hit the White House for saying President Obama learned of alleged treatment delays and secret waiting lists covering up patient deaths from news reports.

“The White House keeps using the same tired excuse and expects Americans to keep believing it,” said NRCC spokesman Matt Gorman. “While it’s nice to know that President Obama is such a news junkie, Americans expect leadership and accountability from their president.”

Speaker John BoehnerJohn Andrew BoehnerDems face hard choice for State of the Union response Even some conservatives seem open to return to earmarks Overnight Finance: Trump, lawmakers take key step to immigration deal | Trump urges Congress to bring back earmarks | Tax law poised to create windfall for states | Trump to attend Davos | Dimon walks back bitcoin criticism MORE (R-Ohio) also called out Senate Democrats for not taking up the House-passed VA Accountability Act, which would make it easier to fire senior executives for poor performance.

“As we head home to honor the men and women who have sacrificed so much for our freedom, it’s fair to ask why Senate Democrats won’t stand up for more accountability?” Boehner said in a statement last week.

The Senate side has also been critical of Democrats on the issue.

“This horrible scandal is another egregious sign of an inept and incompetent government run by Democrats over the last five years,” the National Republican Senatorial Committee said in a blog post.