Reps. Royce and Engel caution President Obama on Iran negotiations

U.S. Representatives Ed Royce (R-Calif.) and Eliot Engel (D-N.Y.) expressed concern on Tuesday in a letter to President Barack Obama related to the interim agreement being negotiated with Iran.

Royce, the chairman of the House Foreign Affairs Committee, and Engel, the committee's ranking member, said they were concerned that the interim agreement does not adequately prevent Iran from making progress toward nuclear weapon capability.

"We are troubled by press reports indicating that the proposed interim agreement discussed at the recent P5+1 meetings with Iran in Geneva may not do enough to prevent Iran from continuing to make progress on developing a nuclear weapons capability, nor does it contain all the elements which we believe must be part of any interim deal," Royce and Engel said.

Royce and Engel are the authors of H.R. 850, the Nuclear Iran Prevention Act. The proposed bill would increase pressure on Iran during its attempt to achieve nuclear weapon capability.

"We must sustain economic pressure and consequent political pressure on the Iranian regime if we hope to reach a final agreement in which Iran has verifiably dismantled its nuclear program," Royce and Engel said. "We look forward to working with you in supporting your diplomatic efforts and buttressing them with tough pressure on Iran. We believe this offers the best path to eliminate peacefully the Iranian nuclear threat."