Sen. Hillary Clinton, D-N.Y., holds a lead over all her major Republican rivals, according to a new Gallup poll taken earlier this month.

Clinton widened her lead over the four major Republican candidates she was matched up against.  Her widest lead was over former Massachusetts Gov. Mitt Romney, who she led 54 percent to 38 percent.  The tightest matchup was with former New York City Mayor Rudy Giuliani, who Clinton led 49 percent to 44 percent.  Clinton also led Sen. John McCain, R-Ariz., and former Tennessee Sen. Fred Thompson. 

Sen. Barack Obama, D-Ill., was tied nationally with Giuliani, but led the other Republican candidates.  His largest lead also was over Romney, who he led 52 percent to 45 percent.

The poll did not test matchups with former Sen. John Edwards, D-N.C., or former Republican Gov. Mike Huckabee of Arkansas.  The poll of registered voters was conducted November 11-14, and has a margin of error of