MILWAUKEE, WI - APRIL 03: Republican presidential candidate, former Massachusetts Governor Mitt Romney speaks to supporters at an election-night rally April 3, 2012 in Milwaukee, Wisconsin. According to early results, Romney won the D.C, Maryland and Wisconson primaries today with a total of 98 delegates at stake. (Photo by Scott Olson/Getty Images)
SAN DIEGO -- Former Massachusetts Gov. Mitt Romney says Tuesday is a "big day" for him.
Texas voters are likely to give him enough delegates to formally clinch the Republican presidential nomination.
He's only 58 shy of the 1,144 needed to become the nominee.
Romney will be in Las Vegas on Tuesday attending a fundraiser hosted by celebrity real estate mogul Donald Trump.