With businessman Donald Trump locking up the Republican nomination, Arizona Senator John McCain is apparently paying close attention to the Democratic presidential primary in California.

When asked if his Senate colleague Bernie Sanders should bow out given projections that former Secretary of State Hillary Clinton is expected win the Democratic nomination, McCain disagreed.

"I am just beginning to feel the Bern," McCain said, chuckling. "Go Bernie, go. He is fighting a valiant fight and we are all behind him."

The Republican Senator argued a victory in the Golden State for Sanders might not change who will be the Democratic nominee, but should give him a seat at the table in terms of setting goals for the party.

"I am not an expert on Democrat politics but it seems to me that if (Hillary Clinton) lost in California that he would fight in the convention for the issues that he wants the Democratic Party to have as their agenda, " he said. "You could make an argument, given all the states he has won that he has a role to play."