Newt Gingrich pledged to stay in the race for the Republican presidential nod, even as Rick Santorum suspended his campaign on Tuesday. “I am committed to staying in this race all the way to Tampa so that the conservative movement has a real choice,” Gingrich said in a statement released after Santorum’s announcement in Gettysburg, Pa. Gingrich, whose campaign is carrying roughly $4.5 million in debt, immediately began trying to use Santorum’s exit as a fundraising vehicle, adding a banner to the front of his website declaring him the “last conservative standing.” “I humbly ask Senator Santorum’s supporters to visit...