The Sacramento Bee reports the U.S. Senate seat held by Sen. Barbara Boxer (D-CA) is vulnerable to a challenge from Gov. Arnold Schwarzenegger (R). In a Field Poll survey of registered voters, Schwarzenegger had a one-point edge, 44% to 43%.
Boxer is up for re-election in 2010, the same year Schwarzenegger is termed out of office.
When the same respondents were asked about Schwarzenegger running for president, 63% said they were "not inclined" to support him.
http://politicalwire.com/archives/2007/10/30/schwarzenegger_edges_boxer_in_senate_match_up.html