Former President Donald J. Trump stood in blazing heat in a Las Vegas park on Sunday and directly appealed to working-class voters by promising to eliminate taxes on tips for hospitality workers.
But beyond that proposal, little at Mr. Trump’s campaign rally suggested that his new status as a felon had changed his message. And when Mr. Trump’s teleprompter apparently stopped working, his speech — which his campaign advisers had billed as focused on issues of local concern to Nevada voters — devolved into familiar stories and riffs.
