Republican presidential hopeful Michele Bachmann is sinking in the polls. A prominent voice in the tea party movement says "It's time for Bachmann to go."
Many grass-roots activists want candidates to sign pledges to, say, undo health-care reform. Will such pledges tie lawmakers' hands later, or improve accountability?
Grass-roots groups, mostly on the right, insist that House and Senate candidates in Election 2010 make specific pledges, before giving their thumbs' up. Spending cuts and repeal of the federal health-care law are often on the pledge list.
Members of the Tea Party movement say they are not beholden to the GOP.