Even the WP has an editorial on Obama’s credibility gap:
For Obama, loss of trust over health-care law poses major problems for his agenda, legacy
See also:
Trust frays between Obama, Democrats
http://www.politico.com/story/2013/11/trust-frayed-between-obama-dems-99897.html
EXCERPT: “The Obamacare debacle has been bad enough that its tough for Democrats to take on faith that the president can fix the problems. His one-time allies are no longer sure that its wise to follow him into battle, leaving Obama and his law not only vulnerable to existing critics, but open to new attacks from his own party.”