"SNL" held off on starting its 42nd season until the first presidential debate aired, and it turned out to be the right move. Baldwin replaced Darrell Hammond as the man to play Trump, and his act quickly went viral.
A week later, Baldwin did the first of several encore performances, starting with a sketch in which he responded to the tapes of Trump's infamous comments to Billy Bush.
Baldwin then got a chance to be a bit more physical when he and McKinnon parodied the Town Hall debate, which featured a cameo from Bobby Moynihan as Ken Bone.
In that same episode, Baldwin also had an appearance in a digital short parodying Beyonce's "Lemonade," in which Trump's ladies strike back after all his antics.
Then Baldwin and McKinnon did one more debate parody, which featured Tom Hanks as Fox News anchor/debate moderator Chris Wallace.
In the final "SNL" episode before Nov. 8, Baldwin finally broke character and ran out with McKinnon to detox from the ugliness of the campaign with the help of some fellow Americans in Times Square.
But while Baldwin's run has been widely hailed, there's one guy who didn't like it: his own brother and avid Trump supporter, Stephen Baldwin. Here's what he had to say about Alec's bit after the final debate in Las Vegas.