The amount of support thrown in by the voters behind GOP frontrunner Donald Trump is likely to make him the Republican candidate with the largest number of votes in the party’s history. With a number of states still left to vote including California, Trump’s current record is held only by former president of the US, George W. Bush.

One of the major reasons that helped Trump secure such big figures in the polls is that this year, a larger number of people have cast their votes, the Washington Post reported.

After establishing a victory in the five East Coast states on Tuesday, Trump now has around 10.1 million votes, which is close to Bush’s 10.8 million record in 2000. Breaking Bush’s record should not be a tough task for Trump with populous states like California, Indiana, and New Jersey still left to vote.

“In an election cycle with a high Republican turnout, his numbers are rising, even more so now that there’s only three candidates” the New York Post quoted Eric Ostermeier, a blogger and political science professor at the University of Minnesota, as saying.

According to Ostermeier, the reasons behind Trump’s huge popularity is his celebrity-like status, extensive media coverage, and his over-the-top image. The blogger used the figures given by Congressional Quarterly for his analysis. Figures by other groups claim that Bush managed to accrue more than 12 million votes in the 2000 primaries. But even in that case, Trump would still be able to break the records.

After he was declared the GOP winner in the five East Coast primaries on Tuesday, Trump said in his victory speech that he considers himself the presumptive nominee.

“Governor [John] Kasich and Senator [Ted] Cruz should really get out of the race … As far as I’m concerned, it’s over,” he was quoted as saying by the Western Journalism.

While Trump was in Indiana to attend a rally, Bobby Knight, the former Indiana University basketball coach, hailed him as “the most prepared man in history to step in as president of the United States.”