Bernie Sanders defeated Hillary Clinton in the Indiana primary on Tuesday night - an upset that he says shows he can still win the Democratic nomination.

Mr Sanders, a self-declared democratic socialist, beat Mrs Clinton by 53.2 percent to 46.8 percent with about three quarters of precincts reporting - although Mrs Clinton remained well ahead in the overall delegate battle for the nomination.

He said he had won a "great upset victory" in Indiana and he expects "more victories in the weeks to come."

The Vermont senator said on Tuesday "the Clinton campaign thinks this campaign is over. They're wrong."

He said he has an "uphill climb" to the nomination but he is "in this campaign to win and we are going to fight until the last vote is cast".

Mr Sanders said he wants another television debate with Mrs Clinton before the California primary.