evidence: The attacks started when it seemed that DeSantis could pose a strong challenge to Trump’s campaign to return to the White House, but they’ve kept up even as DeSantis’ campaign has floundered. [...] For his part, DeSantis has increasingly hit Trump harder. During a CNN town hall on Tuesday, DeSantis accused Trump of "flip-flopping" on abortion, botching the pandemic response and failing to complete a border wall. The DeSantis and Trump campaigns didn’t respond to requests for comment.