Hillary Clinton and Donald Trump won big across the board, but Ted Cruz pulled off a surprise in Oklahoma, and Marco Rubio finally won his first state in Minnesota.
Given his growing lead in delegates, Donald Trump's main obstacle may now be not another candidate but the prospect of an open convention where no one has the votes for a first-ballot nomination.
Hillary Clinton and Donald Trump dominated in the South, according to Associated Press results. Bernie Sanders and Ted Cruz won their home states, and Marco Rubio gained his first victory of 2016.
On the Republican side, Donald Trump is projected to win in Georgia. For the Democrats, Hillary Clinton takes Georgia and Virginia, while Bernie Sanders won in his home state of Vermont.
NPR's Ari Shapiro interviews Rep. Joaquin Castro of Texas about how things are looking for Hillary Clinton on Super Tuesday. She is projected to win the Democratic primaries in Virginia and Georgia.
Donald Trump is projected to win the Republican primary in Georgia. NPR's Ari Shapiro talks to Ron Nehring, California chairman for the Ted Cruz campaign and formerly the California GOP chairman.