by Jonathan Weisman and Michael D. Shear

April 13, 2015

Leaders of the Senate Foreign Relations Committee negotiated into the night on Monday to soften language and possibly shorten a congressional review period in legislation that would give Congress influence over the shape of President Obama’s nuclear accord with Iran.

The Iran Nuclear Agreement Review Act, Congress’s first legislative effort to muscle into the continuing talks to rein in Iran’snuclear program in exchange for the lifting of economic sanctions, will formally go before the committee on Tuesday afternoon. Senator Bob Corker, Republican of Tennessee, the panel’s chairman, and Senator Benjamin L. Cardin of Maryland, its ranking Democrat, pushed to reach bipartisan consensus by Tuesday morning, then join forces to stave off threats to the bill from the right and the left.

A Democratic aide familiar with the negotiations said Monday night that Mr. Cardin was optimistic that a bipartisan accord would be reached by morning.

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