She took the DNA test President Donald Trump urged, and he mocked her for it. Now Sen. Elizabeth Warren is taking a page from Trump's playbook, hitting back in personal terms and calling him "creepy" on Twitter. When it comes to challenging the man who redefined the rules of American political combat, the Massachusetts Democrat, who's weighing a 2020 presidential run, is often doing it Trump's way. And like Trump, she's getting blowback: Jokes. Objections. And grumblings from her own political party about timing, with midterm elections three weeks away.