Trump recently nominated Mark Gaston Pearce (D) to serve on the NLRB for another term. The board will still remain under Republican control, but Pearce’s nomination is nevertheless a surprising victory for labor advocates. Trump’s decision to nominate Pearce was made in the face of near-unanimous criticism by the business community and the Republican party. The three-vote majority-ruled process for approving union elections unfair labor practice complaints means that Pearce will be able to effectively team up with fellow board-democrats Lauren McFerran to make substantive decisions in some cases.
See "Trump Nominates Pearce for Third Term on Labor Board (1)", Hassan A. Kanu and Tyrone Richardson, Bloomberg Business, August 29, 2018