A whopping 23 percent of California Republicans say they still don’t know who they will vote for.

In California, the leader in the GOP race in the run-up to the Feb. 5 primary has switched, according to the latest Field Poll, with Rudolph Giuliani dropping from a strong first to an anemic third, with 13 percent, falling behind John McCain and Mitt Romney, who are in a statistical tie, with 23 percent and 21 percent, respectively. Mike Huckabee is fourth, but in a statistical tie with Giuliani at 12 percent.

In the previous two editions of the poll, from December and October last year, Giuliani had a double digit lead. In December, Giuliani had 25 percent to Huckabee’s 17 percent. Romney had 15 percent and McCain 12 percent. In October, the poll showed Giuliani with 25 percent, Romney with 13 percent and McCain with 12 percent.

Perhaps the most interesting, and determinative, number in the new poll, however, is the number of California Republicans who are undecided two weeks before the vote: a whopping 23 percent say they still don’t know who they will vote for.

Update: Per the comment below, Ron Paul has 7 percent now, which is up from 4 percent in December and double his 3 percent support in October.