A new a new L.A.Times/Bloomberg poll shows Rudy Giuliani trailing among Republicans in three critical states with early primaries, while Hillary Clinton maintains her substantial lead among the Democratic contendders.

Giuliani, the former mayor of New York, trails Mitt Romney in Iowa and New Hampshire among Republican voters, and he lags behind Fred Thompson in South Carolina. But Giuliani is only a few points behind the leader in New Hampshire and South Carolina--within the poll's margin of error--suggesting that the race in those two states is too tight for anyone to be declared a clear front-runner.

The poll also found that Republicans are only lightly committed to their favorite candidates. For example,

a sizable 72% of Iowa Republicans who favored a candidate said they might decide to back someone else.

It's a different story with the Democrats.

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