Amy Klobuchar has clearly been trawling Pete Buttigieg's old tweets

If there's one important rule for preparing for a political debate, it's do your homework. And Sen. Amy Klobuchar (D-Minn.) just earned herself an A.During a debate about healthcare in New Hampshire on Friday, Klobuchar blasted Vermont Sen. Bernie Sanders (D) and Massachusetts Sen. Elizabeth Warren for their ambitious plans to implement Medicare-for-all. And although the former mayor of South Bend, Indiana, Pete Buttigieg, now supports a public option, Klobuchar had brought her receipts: "Pete,