The shadow health secretary said he was "ashamed" that the party had to pull support for its own candidate.
Dentists are to be offered £20,000 to encourage them to take on more NHS patients.
The Labour frontbencher also attacked transport secretary Mark Harper's "bonkers" Conservative conference speech.
"We’ve got to try and find a better way through this," the shadow education secretary said.
Well there's a massive surprise.
"The right to protest peacefully in the UK no longer exists," Graham Smith said.
Last week's council results point to a hung parliament at the next general election.
“This is the terrifying reality after 13 years of Conservative understaffing of our NHS," Labour's Wes Streeting said.
"What planet is he on?"
The shadow health secretary said they put patient safety at risk.