President Obama personally appealed to senators on Tuesday to hold off on seeking additional sanctions while negotiations over Iran’s nuclear program are under way, but continued to face skeptical lawmakers worried that a proposed deal would go easy on Tehran.

The president, along with Secretary of State John Kerry and National Security Adviser Susan Rice, met with key senators for two hours to make their case on Iran. The president is dealing with restless lawmakers on both sides of the aisle who think additional sanctions could help make Iran more pliable at the negotiating table over its nuclear program.

According to Sen. Bob Corker, R-Tenn., Obama asked lawmakers to pause for “a period of time.” Corker said he doesn’t anticipate Congress will act on Iran at least until after the Thanksgiving break.

But after the meeting, six senators wrote to Kerry urging the administration not to accept any deal that would ease sanctions without rolling back Iran’s progress toward gaining a nuclear weapon.

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