It was a combination of Democratic incompetence and Republican success that won President Donald Trump his way back to the White House. This is what gave him a clean sweep of the swing states, as much in Democrat-leaning Michigan, Nevada, Pennsylvania, and Wisconsin as in Republican-leaning Arizona, Georgia, and North Carolina. 

A lot can change from one election cycle to another, but Republicans could put more swing states on the table next time around thanks to additional GOP successes and more Democratic failures that have begun to emerge in the last year. Each state offers possibilities for future Republican victories.