Glover said she based her decision to endorse Obama on his lead in pledged delegates and popular votes, calling him the best candidate to "move our country past where we are now."
When pledged delegates and superdelegates are added together, Obama has 1,742 delegates to Clinton's 1,602, according to the Associated Press. It takes 2,025 to clinch the nomination, although the number could change if party officials reach agreement on seating delegates from Michigan and Florida, whose primaries didn't count because they violated party rules.
Obama, who has repeatedly failed to knock Clinton from the race, has indicated that he expects the contest to continue until the final primaries June 3.
