03/28/2008 02:45 am ET Updated May 25, 2011

Thompson Now At Fourth In National Poll

The political vital signs do not look good for former Sen. Fred Thompson. Down to single digits in recent New Hampshire primary polls, the ex-Law and Order star unleashed a bit of vitriol at Fox News, for what he labeled a "constant mantra" of negative press.

And now, this:

A Rasmussen poll released on Tuesday has Thompson tied for fourth nationally among Republican presidential nominees. Only 12 percent of respondents said they would vote for the Tennessean, the same amount who would back Senator John McCain, R-AZ. Former New York City mayor Rudy Giuliani led the way at 23 percent, followed by former Massachusetts Gov. Mitt Romney at 15 percent and former Arkansas Gov. Mick Huckabee at 13 percent.

The low total is reflective of a Thompson campaign that has, for many conservatives, failed to live up to expectations. Indeed, only one month ago, Thompson found himself at 19 percent in the Ramsussen survey, three points behind Giuliani.