A recent poll indicates she is in trouble.

Via The St. Louis Post-Dispatch:

No matter who wins the Missouri Republican nomination to the U.S. Senate on Aug. 7, Democrat Claire McCaskill is running from behind.

McCaskill, the first-term incumbent Democratic senator, trails all three of her likely Republican challengers, according to a new Post-Dispatch/News 4 poll. She would lose to GOP frontrunner John Brunner by 11 percentage points if they were matched up today, the poll found. She would fall to Sarah Steelman or Todd Akin as well, though by smaller margins….

“A lot of people are going to hold her accountable for her close ties to the president,” said pollster J. Brad Coker of Mason-Dixon Polling & Research Inc. of Washington, which conducted the poll.

On issues unpopular with Missourians, such as the Affordable Care Act and stimulus spending, ‘she’s sort of joined at the hip with him,” said Coker.

That, paired with a Missouri electorate that is moving rightward, makes her path to re-election a narrow one, he said. “She’s swimming upstream, and the current’s getting stronger.”

McCaskill has complete name recognition, so it’s hard to see how she changes the public perception at this point. The most she could do is tear down whoever her opponent ends up being.

McCaskill supported Obamacare, and that’s a vote she cannot change.  She can run from the issue, but she can’t hide: