'The rush to war , or at least to the military option that many Republicans are advocating is not at all in the best interest of the United States , ' White House spokesman Josh Earnest said Monday afternoon . Obama commented that it 's 'somewhat ironic ' that Republicans want to align themselves with 'hardliners ' in Iran . 'It 's an unusual coalition ' Arkansas Sen. Tom Cotton organized two-thirds other GOP senators to sign on to an open letter to Iran 's mullahs . Warned against inking an Iran-US nuclear deal without congressional approval . President Obama 's successor 'could revoke such an executive agreement with the stroke of a pen , ' the letter read . 'Future Congresses could modify the terms of the agreement at any time ' Republicans ' judgement 'seems to be clouded by their abhorrence of President Obama , ' the Senate 's highest ranking Democrat accused .
'The rush to war , or at least to the military option that many Republicans are advocating is not at all in the best interest of the United States , ' White House spokesman Josh Earnest said Monday afternoon . Obama commented that it 's 'somewhat ironic ' that Republicans want to align themselves with 'hardliners ' in Iran . 'It 's an unusual coalition ' Arkansas Sen. Tom Cotton organized 46 other GOP senators to sign on to an open letter to Iran 's mullahs . Warned against inking an Iran-US nuclear deal without congressional approval . President Obama 's successor 'could revoke such an executive agreement with the stroke of a pen , ' the letter read . 'Future Congresses could modify the terms of the agreement at any time ' Republicans ' judgement 'seems to be clouded by their abhorrence of President Obama , ' the Senate 's highest ranking Democrat accused .