WASHINGTON — The Iran nuclear deal has supercharged congressional lobbying, with President Barack Obama securing the support of a prominent Jewish Democrat and pro-Israel groups pressuring lawmakers in an all-out, big-money drive.

Obama, his Cabinet and other allies are making the case that the deal, which calls on Iran to curb its nuclear program in exchange for billions of dollars in sanctions relief, is the best possible way to prevent Tehran from developing a nuclear weapon.

Secretary of State John Kerry, Defense Secretary Ash Carter and Army Gen. Martin Dempsey, the chairman of the Joint Chiefs of Staff, are scheduled to testify today before the Senate Armed Services Committee along with Energy Secretary Ernest Moniz.

Nicholas Burns, former undersecretary of state for political affairs and ambassador to NATO, will meet with House Democrats at the invitation of Minority Leader Nancy Pelosi, D-Calif., who is leading the effort to round up Democratic support for the deal. House Democrats also were scheduled to meet with Obama at the White House later in the day.

“I believe that Israel, the region and the world are far more secure if Iran does not move toward possession of a nuclear weapon,” longtime Rep. Sander Levin, D-Mich., said in a statement that referenced his Jewish faith.