He just doesn’t know when to quit.

Via Daily Caller:

Senate Majority Leader Harry Reid is ignoring those telling him to stop pushing an unsubstantiated rumor that Mitt Romney didn’t pay his taxes for ten years.

On Friday, Reid continued to push the issue by saying the Republican presidential candidate is “the most secretive presidential candidate since Richard Nixon.”

“Forget about president – Mitt Romney couldn’t get confirmed as a cabinet secretary,” Reid said Friday, calling on the Republican to release more of his income tax returns.

Reid has repeatedly attacked Romney this week over the issues of his personal tax filings. In interviews and speeches, Reid cited an anonymous investor from Bain Capital, Romney’s former company, to claim Romney didn’t pay taxes for 10 years.