“I forgot how fun this was. I could watch it for three more hours.” This observation from a young, male conservative encapsulates how middle America viewed President Donald Trump’s historic State of the Union speech. Trump delivered what they were looking for, from plans for the economy, celebrations of Olympic wins, spotlights on forgotten Americans, and, not least of all, sharp contrasts between his policies and those of the Democratic Party. Trump did it all in spades, and with a lot of unintentional help from the Democrats, who did everything from heckling him to holding a bizarre resistance event that...