Vice President Kamala Harris and former President Donald Trump face off at the ballot box on Tuesday with control of the U.S. Senate and House up for grabs.

This election cycle has featured unusual alliances and demographic shifts not seen in recent elections.

Billionaire Elon Musk joined former Democratic Rep. Tulsi Gabbard and former Democrat Robert F. Kennedy Jr. to endorse Trump this time around.

Meanwhile, Harris has taken to the campaign trail with former Republican U.S. Rep. Liz Cheney, daughter of former Republican Vice President Dick Cheney, meaning the iconic Kennedy and Cheney brands are opposing one another yet again, but from the opposite sides this time around.

Those changes come alongside unusual demographic inroads for Trump while men shift more Republican and women favor Democrats, an apparently widening gap for the two sexes.