"...Other supporters, including Penn, Sarandon, novelist Alice Walker and actor Danny Glover will join a 'rolling" fast, a relay in which 2,700 activists pledge to refuse food for at least 24 hours, and then hand over to a comrade.
Though the anti-war movement is trying hard to puncture public perceptions, some experts believe such protests have little impact on how Americans view foreign wars.
Ohio State University professor John Mueller for example, argued in the Foreign Affairs journal in December, that only rising US casualties could be proven to erode public support for a conflict.
Anti-war movements during the Korean and Iraq wars have been comparitively invisible, but public support had eroded in a similar way to the Vietnam conflict, in which the peace movement played a dominant role, he wrote.
Recent polls reveal public scepticism over Iraq, and damage to Bush's personal ratings.
In a poll in Time magazine published Friday, only 33 percent of respondents approved of Bush's leadership on Iraq while 64 percent said they disapproved his handling of the campaign.
A Pew Research Center poll released on June 20, found that only 35 percent of Americans approved of Bush's handling of the Iraqi conflict -- though that was up five percent from a similar poll in February."