Ardent supporters of Sen. Bernie Sanders (I-Vt.) lashed out at the Democratic Party establishment and threatened to bail on the party after a federal judge in Florida dismissed a class-action suit Friday alleging that the Democratic National Committee (DNC) illegally favored Democratic presidential nominee Hillary Clinton over Sanders. The DNC’s treatment of Sanders, who switched his party affiliation to run in the 2016 Democratic primaries, came under scrutiny after the 2016 hack into the DNC’s servers revealed that key party officials favored the more traditional Clinton over the progressive Sanders. But on Friday, Ronald Reagan appointee Judge William Zloch dismissed...