Two Iowa strategists are leaving the McCain campaign.

DES MOINES, Iowa (CNN) – Two of Sen. John McCain's top Iowa political consultants announced their departure Thursday, just two days after four of the Republican presidential candidate's national strategists also called it quits.

Ed Failor Jr. and Karen Slifka, both senior advisers to the campaign, have decided to move on. Failor told CNN the primary reason for his decision was the fact that national campaign manager Terry Nelson was one of the four no longer with the campaign.

"I was part of a team," said Failor. "I decided to serve in the effort led by Terry, who was a friend of mine for years, and I just decided I was not going to continue in the campaign."

Failor said the decision to leave is not necessarily a reflection of any lack of support for the candidate.

"I've cut my ties officially and behaviorally, and I still have a great deal of respect for the senator."

McCain's Iowa communications coordinator, Tim Miller, said the political consultants' departure does not affect the campaign "at this stage."

"We're still proceeding, and we're moving forward to compete in the Iowa caucuses."

– CNN's Chris Welch

Related: McCain campaign running out of money