Today’s move by Senate Republicans to boycott a committee confirmation vote on Gina McCarthy to lead the EPA is just another in a series of shameless tactics aimed at hampering the Environmental Protection Agency and preventing it from doing the people’s business. The list includes endless filibusters; sequester cuts that make it harder to enforce existing laws; a host of attacks on specific environmental regulations under the Clean Air Act, Clean Water Act and other statutes addressing critical environmental issues; and wholesale assaults on the regulatory process. To that undistinguished list, we can now add “taking their marbles and going home,” rather than voting on a presidential nominee to lead the EPA.