Mathematically, the Democratic presidential primary has been over for months, and when the primaries in California and New Jersey are over, Hillary Clinton can probably add presumptive candidate to her list of titles.

But the numbers, however insurmountable, have not fazed Sen. Bernie Sanders, or his supporters who have turned out in stadium-full crowds as he ratchets up things in California.

Clinton has been equally busy in the Golden State, mainly at smaller gatherings with Hollywood notables who are able to contribute sizable donations to her campaign.

Tuesday, California Gov. Jerry Brown endorsed Clinton, stating that her nomination was the only way to “stop the dangerous candidacy of Donald Trump.”

Brown, a popular governor in his fourth and final term, said the stakes have never been higher in a presidential race, explaining, “This is no time for Democrats to keep fighting each other. The general election has already begun. Hillary Clinton, with her long experience, especially as secretary of state, has a firm grasp of the issues and will be prepared to lead our country on day one.”

Day one is still a long way down the road.

A recent poll, conducted by the Public Policy Institute of California, shows Clinton ahead of Sanders by 46 percent to 44 percent, within the poll’s margin of error. In effect, Sanders has closed the gap decisively since the early days of the campaign when he trailed by a large double-digit margin.

Even so, this poll is only one of many polls conducted over the past several weeks, and on average they all favor Clinton by more than a 2 percent margin.

If Clinton loses California the margin will not be enough to change the outcome because Sanders has to garner nearly 70 percent of the delegates to enforce his argument about remaining in the contest. Such a defeat would be a serious setback for Clinton, intensifying the doubt expressed by many of her supporters, including the super delegates whose votes will put her over the top by next week.

According to the polls in California, both Clinton and Sanders lead Trump. In New Jersey, the polls show that the race between Clinton and Trump is getting tighter.

Defeating Sanders in California and New Jersey should bring the numerical count to a close, and perhaps even change Sanders’ mind about taking his challenge right to Philadelphia in July.

By then maybe her email debacle will be as dead and irrelevant as Sanders once said it was.

That would leave her with probably only one remaining irritant.