Conservative gives the candidate he backs in California an ultimatum

(CNN) - A prominent conservative is issuing an ultimatum, essentially telling the candidate he supports to do better in the polls – or lose his support.

Erick Erickson, editor-in-chief of RedState.com, backs Assemblyman Chuck DeVore in the California Republican senate primary. DeVore is locked in a battle with former Hewlett-Packard CEO Carly Fiorina and former Rep. Tom Campbell for the right to face Democratic Sen. Barbara Boxer in November.

Speaking Tuesday with CNN Chief National Correspondent John King, Erickson – a CNN contributor - said he won't support DeVore much longer if the candidate does not improve his political standing.

"Look, if Chuck DeVore hasn't gone up in the polls within two weeks significantly, I'll be with Carly Fiorina because Tom Campbell is that bad," Erickson said.

DeVore is considered the more conservative of the three candidates. But Campbell has maintained a steady lead over his opponents in recent polls even as both DeVore and Fiorina attack him as too liberal.

"There are a lot of Republicans who feel like Chuck Devore, with four weeks left, hasn't been able to surge," Erickson said on CNN's John King, USA. "And it's everybody, anybody but Campbell."