By MARTY GOODMAN
Workers in the U.S. may be on the cusp of a big labor upsurge. In 2021, petitions to hold union elections were up more than 50 percent over the previous year during the six months ending in March, on pace to reach its highest point in at least a decade. Successful organizing struggles at Amazon, Starbucks and other locations continue to grow. Angry younger workers in particular are stepping up to play militant leadership roles, many with Black Lives Matter protest experience.