Sen. Marco RubioMarco RubioScarborough: Trump has chosen the 'wrong side' THE MEMO: Trump reignites race firestorm RNC spokeswoman: GOP stands behind Trump's message 'of love and inclusiveness' MORE (R-Fla.) is hosting a fundraiser for Rep. Tom CottonTom CottonImmigration battlefield widens for Trump, GOP The RAISE Act reveals what Trump really thinks about immigrants How Trump's legal immigration cuts could be a blessing to Dreamers MORE's (R-Ark.) Senate campaign in Miami, the latest help Rubio has provided to Cotton's campaign.

The senator will host a breakfast for Cotton at a popular Cuban restaurant in Miami on Monday, with the minimum contribution suggested at $500.

Rubio's leadership PAC is already spending heavily to help Cotton in his race against Sen. Mark Pryor (D-Ark.), airing ads touting Cotton's military background. The ads are the first major effort to help a 2014 candidate from the group.

The Miami Herald first reported the fundraiser.