STEVE PEOPLES, MEG KINNARD and BILL BARROW
COLUMBIA, S.C. (AP) — The Democrats' 2020 primary season enters a critical four-day stretch that will help determine whether the party rallies behind Bernie Sanders or embraces a longer and uglier slog that could carry on until the national convention.
This marks a dangerous moment for a political party desperate to replace President Donald Trump but deeply conflicted over whether Sanders, the undisputed Democratic front-runner and a self-described democratic socialist, is too extreme to defeat the Republican president.
"Only two things are going to happen: either Bernie or brokered," said James Carville, a veteran Democratic strategist.
Carville is uncomfortable with a Sanders nomination but fears that a brokered conventi