Top liberal senators are raising objections to the Republican nominee to be a trustee of the Social Security and Medicare trust funds, claiming that the candidate aims to dismantle the programs.

Sen. Sherrod Brown, D-Ohio, raised concerns about Charles Blahous’ candidacy Wednesday during a Senate Finance Committee hearing, saying that Congress “should be working to expand and strengthen Social Security, not putting someone in a position of public trust who helped write the blueprint for privatizing Social Security and collects a paycheck promoting plans to cut benefits.”