UPDATE: A source inside the Maes campaign tells CNN the embattled Republican nominee has decided to stay in the Colorado governor's race, despite increased pressure today for him to drop out.
(CNN) – Colorado Senate candidate Ken Buck is calling on fellow Republican Dan Maes to quit his bid for governor, the latest in a string of Colorado Republicans calling on the Tea Party favorite to step down before he is officially certified as the party's nominee later Friday.
"After having a lengthy conversation with Dan Maes, it is clear to me that Dan is struggling to determine the best path for his campaign, his family and for Colorado," said Buck in a statement. "I have decided that I can no longer support his candidacy for governor of Colorado."
Buck's statement comes after revelations Maes had embellished his resume about his business background and accused a Denver bike-sharing program of being an undercover plot orchestrated by the United Nations to advance an environmentalist agenda.
(CNN) - Third-party Colorado gubernatorial candidate Tom Tancredo, the former Republican congressman, wants GOP nominee Dan Maes out of the race, telling CNN the Tea Party-backed candidate is a "total fraud."
"He's a Republican, but tough crap; I don't care if he's a Republican, he's not the right candidate," Tancredo said.
Tancredo confirmed to CNN that until now he was willing to withdraw his third party candidacy if—and only if—Maes was willing to drop out of the race and allow the party to replace him with another candidate.
"He can't win," Tancredo said of Maes. "He's not a credible candidate."
But Maes' communications director, Nate Strauch, said the Republican candidate has "flatly rejected" Tancredo's offer.