While the GOP has become increasingly isolationist with Trump at the helm of the party, Harris has touted the Biden administration's efforts to strengthen global alliances. And on the issue of Ukraine, the parties have drifted farther apart on how much support the U.S. should be giving to the war-ravaged country more than two years later.

The only thing the debate revealed was Ms. Harris’ arrogance and, with all her childish facial features and over-animation as Mr. Trump spoke, her immaturity.