(CNN) - Democratic Sen. Ben Nelson joined Republican lawmakers in opposing President Obama's controversial nominee for the National Labor Relations Board.
Nelson said Monday he would vote against seating union lawyer Craig Becker on the five-member board because "he would pursue a personal agenda."
"This is of great concern, considering that the Board's main responsibility is to resolve labor disputes with an even and impartial hand. In addition, the nominee's statements fly in the face of Nebraska's Right to Work laws, which have been credited in part with our excellent business climate that has attracted employers and many good jobs to Nebraska," the Nebraska senator said in a statement.
Becker has served as an associate general counsel to the Service Employees International Union and the AFL-CIO. Republicans have stalled his nomination because of his union ties and concerns that he would sidestep Congress and make pro-union changes to the law.
In a statement before the Senate Health, Education, Labor and Pensions committee last week, Becker said "should I be confirmed, I will always remain faithful to the will of Congress."
He also said he has represented "not simply unions but also individual employees, belonging to no labor organization, in diverse trades and professions - from prison guards to retail clerks, from hospital administrators to home-care workers."
"Should I be confirmed, I will draw on in collaborating with my fellow board members to fairly, efficiently and faithfully apply the law," he said.
The Senate is scheduled to vote on cloture motion to end debate on the Becker nomination at 5 p.m. Tuesday. The vote was supposed to take place Monday but it was delayed due to the weather.
Obama said Tuesday that he is prepared to make several recess appointments during the upcoming congressional break if Congress fails to hold a vote on a number of stalled nominations.
Prior to Nelson's announcement, it appeared as if Republican Sen. Scott Brown could have cast his first decisive vote, now that the Democrats no longer have a 60-seat supermajority in the Senate. Brown defeated Democrat Martha Coakley last month in Massachusetts' special election to fill the late Edward Kennedy's Senate seat.