Cummings said he still thinks Obama is operating with integrity, but he noted that not all his Democratic colleagues agree.
Rep. William Lacy Clay, like Cummings, a prominent member of the Congressional Black Caucus who personally likes Obama, struggled to describe the state of play between congressional Democrats and the president.
"I am trying to think if you can call it a relationship at this point," he said.
Clay said the administration is now obligated to "fix it, fix all of it" after Obama apologized this month for both the insurance website problems and his earlier promises that people could keep their old polices. Otherwise, he said, "a wide brush will be used to paint us all as incompetent and ineffective."
Obama is now allowing insurance companies to reissue their canceled policies for another year. But "Obamacare's" problems have left Democrats vulnerable to an orchestrated assault by Republicans.
The political body language tells the story of the strain. Thirty-nine House Democrats in Obama's party defied the president's veto threat and voted for a Republican-sponsored bill to permit the sale of individual health coverage that falls short of requirements in the law.
In the Senate, several Democrats from battleground states have signed onto legislation to further weaken the health care law. Sponsored by Louisiana Sen. Mary Landrieu, who's facing a tough re-election challenge, the bill would require insurance companies to permanently continue selling policies that the law deems substandard. Landrieu herself skipped an event with Obama earlier this month when he appeared at the Port of New Orleans. She said she had a long-standing engagement elsewhere in the state, which Obama lost last year by 17 points.
Repairing the relationship between Obama and his allies may be as complex as fixing the website and health care law. Much rests on rebuilding trust with the public, a solid majority of which now opposes "Obamacare," according to multiple polls. Both parties will be watching on Saturday to see whether the vast majority of those who try to sign up for policies on the website will succeed, as Obama has promised. Democrats have urged the administration to quit setting "red lines," like the Nov. 30 deadline, that carry the risk of being broken.
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Associated Press writer Laurie Kellman and Jennifer Agiesta, AP's director of polling, contributed to this report.