Members of Trump’s own party line have lined up to condemn the deal, which pledges to help fund Iran and scrap sanctions

Many Trump loyalists and supporters have voiced concern and disappointment over what they see as major shortcomings of the deal with Iran

One GOP Senator described the deal as "the worst foreign policy blunder in decades." Others are privately comparing it to the Obama Iran deal that Trump tore up.

The MOU is the “worst foreign policy blunder in decades,” Republican Sen. Bill Cassidy wrote.