Twelve candidates took the stage for the CNN/New York Times debate in Westerville, Ohio. . Impeachment was the first topic, with all the candidates in agreement that Trump should be removed from office. . Joe Biden defended his son Hunter when asked about his business ties to foreign countries. . My son did nothing wrong. I did nothing wrong, Joe Biden. When asked about her support of Medicare for All, Sen. Elizabeth Warren refused to say if taxes would increase for the middle class. . Bernie Sanders said taxes would go up to fund Medicare for All, but they would be "substantially less" than what is paid for premiums and out-of-pocket expenses. Sanders also thanked the rival candidates "for their love, for their prayers" after he suffered a heart attack earlier this month. . Businessman Tom Steyer made his debate debut. He has long pushed his signature issue - the impeachment of Donald Trump. . Pete Buttigieg and Rep. Tulsi Gabbard, both veterans, clashed over her answer on America's role in Syria. . Gabbard's view is that America’s presence in the Middle East, not Trump's removal of troops, is responsible for the recent bloodshed.