In Puerto Rico, CNN estimates Hillary Clinton won 38 delegates while Barack Obama won 17 — a net gain of 21 pledged delegates for the New York senator.
Obama's overall delegate lead now stands at 155 — 117 in pledged delegates, and 38 in superdelegates.
The Illinois senator is now 48 delegates short of clinching the Democratic nomination while Clinton is 203 delegates short of clinching the nomination.
Only two states remain -- both Montana and S. Dakota favor Obama.
