Story highlights The speech will look to cast Trump as a foreign policy lightweight and security risk

Recently, Clinton has directly challenged Trump's ability to handle foreign policy issues

(CNN) Hillary Clinton will look to draw a significant contrast with presumptive Republican nominee Donald Trump on foreign policy Thursday when she delivers what her campaign is billing as a "major" foreign policy speech in San Diego.

The speech, which will kick off five days of campaigning ahead of California's June 7 primary, is set to cast Trump as a foreign policy lightweight and security risk, according to aides, and highlight Clinton's experience on the international stage. The speech is in San Diego, in part, because of the many military personnel in the city.

Clinton plans to "make clear the threat that Donald Trump would pose to our national security and to put forth her own vision for keeping America safe at home and leading in the world," a campaign press release said about the speech.

"Clinton will rebuke the fear, bigotry and misplaced defeatism that Trump has been selling to the American people," said one senior aide. "She will make the affirmative case for the exceptional role America has played and must continue to play in order to keep our country safe and our economy growing."

Since Trump became the presumptive Republican nominee, Clinton has directly challenged his ability to handle foreign policy issues and has taken to labeling him a "loose cannon" who will make it more difficult for the United States to operate on the global arena.

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