Yeah, they should be worried.
Check it out:

Iowa Democrats are worried Rep. Bruce Braley’s remark that Sen. Chuck Grassley (R) is a “farmer from Iowa who never went to law school” could come back to haunt him.

Braley’s Senate campaign is in damage control mode following the release of a video in which the Democrat tells Texas trial lawyers at a fundraiser that he’s better equipped to serve on the Senate Judiciary Committee than his state’s senior senator.

“If you help me win this race, you may have someone with your background, your experience, your voice, someone who’s been literally fighting tort reform for 30 years, in a visible or public way, on the Senate Judiciary Committee,” Braley said in the clip, which Republicans have been gleefully circulating. “Or you might have a farmer from Iowa who never went to law school, never practiced law, serving as the next chair of the Senate Judiciary Committee. Because, if Democrats lose the majority, Chuck Grassley will be the chair of the Senate Judiciary Committee.”