Pablo Martinez Monsivais, Associated Press
President Barack Obama and Secretary of State John Kerry listen during a multi-lateral meeting with Central American Integration System (SICA) Presidents, Friday, April 10, 2015, in Panama City, Panama. Obama is in Panama to attend the VII Summit of the Americas.

WASHINGTON — The Obama administration stepped up its lobbying campaign on Capitol Hill on Monday to try to persuade lawmakers not to pass any legislation that could hamper prospects for negotiating a final deal with Iran to curb its nuclear program.

A Senate panel is set to vote Tuesday on an intensely debated bill that would give Congress a say on a potential deal aimed at keeping Tehran from developing a nuclear weapon. On the House side, Majority Leader Kevin McCarthy said Monday he will bring the bill to the floor if the Senate acts on legislation giving Congress the power to review any deal.

Republicans and Democrats maintain that Congress should have a say on an international deal with Tehran to curb its nuclear program and have lined up behind legislation. The White House has pushed back, threatening a presidential veto while warning that the bill could scuttle the delicate talks involving the United States, Iran and five world powers.

President Barack Obama has threatened to veto the bill it as it's written, although senators from both parties are expected to offer amendments.

"There have been a lot of representations, misrepresentations" about what's contained in the framework agreement the U.S. and its partner nations negotiated with Tehran, Secretary of State John Kerry told reporters outside a congressional auditorium where he was giving a closed-door briefing.

A reporter suggested that many lawmakers already have made up their minds about the Iran deal and the bill that would allow Congress to weigh in on an important foreign policy issue facing the president. "That's what we're here to find out," Kerry replied.

"We hope Congress will listen carefully and ask the questions that it wants to, but also give us the space and time to be able to complete a very difficult task which has high stakes for our country," said Kerry, who also plans to lobby members Tuesday.

At the White House, Obama met with Jewish leaders. While Israeli Prime Minister Benjamin Netanyahu is intensely skeptical that international negotiators can reach a verifiable deal with Iran, which has threatened to destroy Israel, some American Jewish groups have backed the international negotiations.

McCarthy, R-Calif., told reporters that he spoke with Sen. Bob Corker, R-Tenn., chairman of the Senate Foreign Relations Committee, earlier in the day. McCarthy said he told Corker that if the Senate approves the bill, the House will vote on it.

"It's my intention to bring it to the floor of the House and move it," McCarthy said at a news conference as Congress was returning from a two-week spring break.

"Lines in the sands have moved back," McCarthy said, claiming the U.S. has back-tracked on some of the demands it had at the beginning of the talks. "A lot of the questions will be why have they moved back and will Iran ever be able to have the capability of having a nuclear weapon? That's a key question."

Under the bill, Obama could unilaterally lift or ease any sanctions that were imposed on Iran through presidential executive means. But the bill would prohibit him for 60 days from suspending, waiving or otherwise easing any sanctions that Congress levied on Iran. During that 60-day period, Congress could hold hearings and approve, disapprove or take no action on any final nuclear agreement with Iran.

If Congress passed a joint resolution approving a final deal — or took no action — Obama could move ahead to ease sanctions levied by Congress. But if Congress passed a joint resolution disapproving it, Obama would be blocked from providing Iran with any relief from congressional sanctions.

Iran says its program is for civilian purposes, but the U.S. and its partners negotiating with Tehran suspect Tehran is keen to become a nuclear-armed powerhouse in the Middle East, where it already holds much sway.

The bill has led to a political tug of war on Capitol Hill, with Republicans trying to raise the bar so high that a final deal might be impossible, and Democrats aiming to give the White House more room to negotiate with Tehran.

Senators of both parties are considering more than 50 amendments to the measure introduced by Corker and Bob Menendez, D-N.J.

Associated Press writers Laurie Kellman, Donna Cassata and Erica Warner contributed to this report.