Obama repeatedly summoned Reagan's hope and optimism Wednesday night as Democrats try to attract disenchanted Republican voters uneasy about Donald Trump's claim to the GOP mantle and fearful about a possible presidency. Trump, he said, calls the United States "a divided crime scene" and hopes to win votes by scaring people over immigration and crime. Former Reagan speechwriter John Podhoretz, now editor of the conservative Commentary magazine, took note on Twitter of the similarities between Obama's remarks and Reagan. Shortly before Obama spoke, Democrat-turned-Republican-turned-independent Michael Bloomberg stood on the convention stage and urged voters to back Clinton, the "sane, competent person." Several prominent Republicans, including the two former presidents Bush and 2012 GOP nominee Mitt Romney, have not endorsed Trump.