It's like having a presidential race between Biden and Trump and then installing Weird Al Yankovic as president after all votes are counted.
This could still happen in the USA. The electors (the 538 people in the Electoral College who actually pick the president) could vote for anyone they wanted, and if enough wanted Weird Al then he would be POTUS. States have made laws to require electors to vote for the person who won the state election or face punishment, but that is not a Constitutional requirement or anything.
Is that meant to be a bad thing? Because you make it sound like a good thing.