It was "Abuse of Power" plain and simple and was a way for Obama to appoint 3 pro-union members to the board.
Obama’s NLRB pushes pro-union agenda
The National Labor Relations Board unleashed a raft of precedent-busting, pro-union decisions soon after President Barack Obama’s reelection in November.
The board’s three Democratic appointees issued rulings that weakened checks on union power, including two high-profile decisions forcing employers to automatically deduct union dues from worker paychecks when contract agreements expire and limiting the ability of employees to exercise their Beck rights.
“The board is an inherently political institution because it is made up of political appointees,” the Center for Union Facts’ managing director J. Justin Wilson said. “They are constantly overruling themselves. Unlike the Supreme Court, they do not like to overrule existing precedent.”