Harry Reid said he has no regrets for polarizing the Senate, attacking the Koch brothers, and falsely accusing Mitt Romney of not paying taxes.

Republicans have criticized Reid, who recently announced that he would not seek re-election in 2016, for hostile tactics that soured the environment on Capitol Hill.

The Senate minority leader dismissed claims that he is the problem with Washington and said he his proud of taking on the Koch brothers when no one else would.

Reid appeared to take some joy of being a part of the Democrat machine that took down Romney in 2012.

"Let him prove that he has paid taxes, because he hasn’t," Reid said on the Senate floor without any evidence to back his accusations.

When asked about his comments by CNN’s Dana Bash, Reid never rejected the notion his words were "McCarthyite" in nature. He admitted no wrongdoing.

"Well, they can call it whatever they want," Reid said. "Romney didn’t win, did he?"

Reid’s approach of the ends justifying the means is sure to upset many and is likely to further propel Reid’s reputation of being a dirty politician.