A new Rasmussen survey shows Mitt Romney beating each of his remaining GOP rivals in head-to-head match ups, showing the frontrunner still dominant even if there was just one so-called "anti-Romney" candidate left.
Romney beats Newt Gingrich 46% to 40%, tops Rick Santorum 50% to 38%, and crushes Ron Paul 58% to 30%.
The latest Gallup tracking poll also shows Romney expanding his lead over the field. He's in front with 37%, followed by Gingrich at 22%, Santorum at 16% and Paul at 11%.