AP
If he sweeps the states, he'll be in a good position to grab the majority of delegates he needs to clinch the nomination. If he doesn't, some predict a contested convention down the road.
In addition to the politicians and pundits - like Sarah Palin and Ann Coulter - who have endorsed Trump, many celebrities are throwing their support behind the divisive businessman.
Here are 23 celebrities and entertainment figures who are showing their support for him, from Kid Rock to Mike Tyson: