Former Pennsylvania Rick Santorum has announced he is suspending his presidential campaign, effectively ending the Republican primary process and conceding the nomination to former Massachusetts senator Mitt Romney.
Rep. Ron Paul (R-Tex.) and ex-House Speaker Newt Gingrich still officially remain in the race, but they have struggled to compete in the major primaries (Gingrich has only won his home state and South Carolina and Paul hasn’t won any contests) and have already effectively acknowledged defeat to Romney.
