ORLANDO, Fla. — Senator Elizabeth Warren of Massachusetts, speaking to thousands of Latinos at the annual conference of NCLR, also known as the National Council of La Raza, forcefully urged them to vote for Hillary Clinton while making only a passing, barely audible reference to Senator Tim Kaine of Virginia, her newly named running mate.

Ms. Warren mainly offered new invective against Donald J. Trump, with whom she has a running feud, saying he was “a man born with cash in his fist and hate in his heart.”

She said Mr. Trump’s questioning of the impartiality of Gonzalo Curiel, a Mexican-American judge hearing a case against one of his businesses, had sent a message “as simple as it is disgusting: Since Trump is a bigot, a Mexican-American judge can’t be fair to him.”

The crowd gave her a prolonged standing ovation when she said, “We will never build Donald Trump’s stupid wall.”