Oscar De La Hoya says he's known Donald Trump for decades -- and says he "truly feels" his old friend's antics are simply an act in a diabolical plot to get Hillary Clinton elected.
Oscar joined the guys on the "TMZ Sports" TV show on FS1 -- and brought up Trump ... saying Donald inspired him to put together his upcoming superfight between Canelo Alvarez and Amir Khan because they both come from background that Trump has targeted in his campaign.
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