"Can't do both," DeSaulnier said Monday afternoon, a few hours after announcing he plans to run this year for the Congressional seat of retiring Rep. George Miller.
DeSaulnier, a Democrat from Concord, and Sen. Kevin de León, D-Los Angeles, had been the front-runners in a bid to become the next President pro Tem of the state Senate. Current Senate leader Darrell Steinberg is leaving office at the end of this year.
DeSaulnier declined to say whether he would urge his supporters to back de León.
"He came in and said, 'I'd like your support,'" DeSaulnier said of de León. "I told him I'd like to talk to my supporters and see what they think."
De León said the race remains an "ongoing process" and declined to make any predictions, saying just that he plans to talk further with DeSaulnier in hopes of gaining his support.
"He's a senator who I respect tremendously and I'm looking forward to that conversation," de León said.
PHOTO: Sen. Mark DeSaulnier on August 11, 2009. The Sacramento Bee/Manny Crisostomo