Joe Biden may be the Democratic presidential front-runner, but in the past 72 hours, he hasn’t been acting like it. During this week alone, Biden abandoned his decades of support for the Hyde Amendment, which bars federal funds abortion, then flipped back to supporting it, and then switched yet again to opposing it.

As a purely strategic matter, Biden’s flip-flop — and flip again — spells danger for his campaign. The best case for Biden is his electability and ability to beat President Trump in a general election. Americans liked Barack Obama on a personal level, and Biden has benefited both from that goodwill and his distance from the Democratic Party’s sharp, left-wing pivot on policy.