Terence Flynn, one of two Republican members on the five member NLRB, resigned from the Board Sunday, May 27, effective July 24. Flynn has been under investigation over alleged inappropriate communications regarding the Board's internal deliberations. Flynn's resignation will permit President Obama to appoint another remember.
By tradition, that member should be a Republican. President Obama himself was the subject of controversy earlier this year by using his recess appointment powers to fill three vacancies on the Board. Member Flynn was one of those recess appointments. More information about the resignation is available here.