The U.S. Catholic bishops have welcomed the Obama administration’s tentative agreement aimed at limiting Iran’s nuclear ambitions, and their top spokesman on international affairs bluntly warned Congress against doing anything to undermine it.

The bishops “oppose efforts that seek to undermine the negotiation process or make a responsible multi-party agreement more difficult to achieve and implement,” Bishop Oscar Cantu, chairman of the bishops’ Committee on International Justice and Peace Committee, wrote to House and Senate lawmakers on Monday (April 13). MORE