Are Union Pensions Guaranteed?

First, private multiemployer pensions are regulated by the U.S. Department of Labor and have been federally guaranteed for 40+ years by the Pension Benefit Guaranty Corporation. Congress is unlikely to walk away from pensions it has guaranteed for decades.

Can a union take away your pension?

NLRB, 473 U.S. 95 (1985), the United States Supreme Court held that union members have the right to resign their union membership at any time. ... (Your participation in an employer-sponsored or jointly-sponsored pension plan provided as an employee benefit cannot be adversely affected by nonmembership in a union.)

Can you be denied your pension?

In order to deny your pension plan, the plan's provider must have valid legal grounds to do so. As it typically stands for pension plan denial cases, valid reasons to completely deny a pension plan are somewhat rare, such as the pension fund running out of money.