Another poll out today is cause for concern for President Obama's health care agenda as he leaves for vacation first at Camp David, then Martha's Vineyard.
In the Washington Post/ABC News survey, 49 percent of Americans say they believe Obama will be able to drive significant improvements in the health care system, down nearly 20 percentage points from before he took office.
As Republicans and other critics continue to hammer his health care proposals, confidence in Obama's overall leadership is also eroding, according to the poll: 49 percent of respondents express confidence that he will make the right decisions for the country, down from 60 percent at the 100-day mark in his presidency.
His overall job approval rating, 57 percent, is down 12 percentage points from its April peak, and his disapproval number has risen to 40 percent, its highest yet.
The national survey was conducted Aug. 13-17 and has a sampling error of plus or minus 3 percentage points.
An NBC News/Wall Street Journal poll released earlier this week suggested that Obama and Democrats had lost control of the health care message as many Americans believed what critics had been saying about the proposals.
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Glen Johnson is Politics Editor at boston.com and lead blogger for "Political Intelligence." He moved to Massachusetts in the fourth grade, and has covered local, state, and national politics for over 25 years. E-mail him at firstname.lastname@example.org. Follow him on Twitter @globeglen.