Republican frontrunner Donald Trump has been drawing large crowds at events across the country, but his event in Alabama today could draw his largest gathering yet.

As Trump gets closer to his 'pep rally' in Mobile, it keeps changing locations.

The rally was moved from the civic center's theater and expo hall, which has only about 2,000 seats, to its main hall, which can hold around 10,000. But the latest plan has Trump at Ladd-Peebles Stadium, which has room for over 40,000.

It's not clear how many people will actually show up for Trump, but big crowds can mean big things for presidential candidates. For instance, some of the biggest crowds have helped spur Bernie Sanders in the race for the Democratic nomination.

Trump's event comes amid his continued surge, and some more blows launched at fellow candidate Jeb Bush. The former Florida governor has struggled in the polls lately, including a recent one which even shows him trailing in his home state.