Has Bernie Sanders revolutionized U.S. politics?

What’s happening: Vermont Sen. Bernie Sanders suspended his presidential campaign on Wednesday, effectively ceding the Democratic presidential nomination to former Vice President Joe Biden.

“I cannot in good conscience continue to mount a campaign that cannot win and which would interfere with the important work required of all of us in this difficult hour,” said Sanders in a live stream from his Vermont home.

The self-identified democratic socialist was among the frontrunners after strong showings in the first three primary states. But his fortunes turned when several of...