Open this photo in gallery: U.S. Representative Matt Gaetz speaks during a press conference after attending the trial of former U.S. president Donald Trump at Manhattan Criminal Court in New York City on May 16.Andrew Kelly/Reuters U.S. Rep. Matt Gaetz evoked language adopted by the far-right Proud Boys extremist group as he appeared at court Thursday to support Donald Trump at his hush money trial, reflecting the undercurrent of activist elements present among the presumptive GOP nominee’s supporters as he seeks a return to the White House. “Standing back, and standing by, Mr. President,” Gaetz wrote as he posted a...