Sen. Elizabeth Warren — I Am Not A Member Of Any Tribal Nation

Warren has taken heat from both Republicans and Democrats for taking a DNA test that showed she may only be 1/1024th Native American, and then saying that test showed she's right to claim that heritage. Democrats grumbled that her announcement was a distraction, and even Native Americans argued that she was undermining them by staking a claim to their heritage.

But Warren said in the debate that she never claimed that heritage in order to advance her career.

"The Boston Globe has done an extensive analysis and come up with the fact that nothing in my background ever made any difference in my hiring," she said.

Warren also accused Diehl of running President Trump's playbook by raising her DNA test.

"Mr. Diehl knows this, and the reason he raises it is because he's just trying to do Donald Trump's bidding here," she said.