WASHINGTON - US Democratic presidential candidate Bernie Sanders has predicted that the Democratic presidential election process would lead to a contested summer convention against party’s front-runner Hillary Clinton.

Speaking to reporters on Saturday in Los Angeles, California, Sanders showed few signs of surrender, vowing to fight until the 2016 Democratic National Convention in July in Philadelphia, Pennsylvania. 

Nearing the end of the primary season, a defiant Sanders is pushing back against the likelihood that Clinton will soon declare victory as the Democratic presidential nominee.

Sanders told reporters neither candidate would have enough pledged delegates by the end of the primaries on June 14 to declare victory and would be dependent upon superdelegates to win the nomination. “In other words, the Democratic National Convention will be a contested convention,” he said.

He urged news organizations to hold off on declaring Clinton a victor as the presumptive nominee following Tuesday’s primary election in California and five other states.Clinton, a former senator and secretary of state, is poised to unofficially clinch the presidential nomination following the close of the primary election polls on Tuesday.

“It is extremely unlikely that Secretary Clinton will have the requisite number of pledged delegates to claim victory on Tuesday night,” Sanders said.

“Now I have heard reports that Secretary Clinton has said it’s all going to be over on Tuesday night. I have reports that the media, after the New Jersey results come in, are going to declare that it is all over. That simply is not accurate.”

Later in the day, Sanders spoke at a campaign rally in Los Angeles, where he underscored his differences with Clinton on campaign financing, minimum wage and the Iraq War.”Hillary Clinton wants small, incremental changes. We want to transform this nation,” Sanders said the Los Angeles Memorial Coliseum.

An Associated Press count shows Clinton currently leading Sanders among pledged delegates 1,769 to 1,501. Among superdelegates, she is leading 547 to 46.

The latest polls show Sanders and Clinton in a virtual tie in California, the country’s most populous state. A loss in California for Clinton would provide a sour and deflating end to her primary campaign.