Addressing thousands at a boisterous rally in Mississippi, Trump relied on his own visceral sense of the moment and mocked Christine Blasey Ford for gaps in her memory, directly impugning the accuser’s credibility. Establishment Republicans initially reacted with horror. But Trump’s 36-second off-script jeremiad proved a key turning point toward victory for the polarizing nominee, White House officials and Kavanaugh allies said, turbocharging momentum behind Kavanaugh just as his fate appeared most in doubt. . . . “How did you get home? ‘I don’t remember,’ ” Trump said, reenacting Ford’s hearing. “How did you get there? ‘I don’t remember.’ Where is...