Seventy-six senators on Monday signed a letter demanding the Obama administration take a harder line to stop Iran's nuclear program, including weighing possible military options.
"We believe our nation must toughen sanctions and reinforce the credibility of our option to use military force at the same time as we fully explore a diplomatic solution to our dispute with Iran," read the letter sent to the White House.
The letter is signed by conservative lawmakers including Sens. Ted Cruz (R-Texas), Marco Rubio (R-Fla.) and Kelly Ayotte (R-N.H.), as well as prominent Democrats including Sens. Charles Schumer (N.Y.), Kirsten Gillibrand (N.Y.) and Barbara Mikulski (Md.).
Lawmakers called on President Obama to "bring a renewed sense of urgency to the process."