senate panel is set to vote tomorrow on an intensely debated bill that would give congress a say on a nuclear pact with iran .
house majority leader kevin mccarthy said today he will bring the bill to the floor if the full senate approves it .
administration officials as high up as the president last week made calls to more than 130 federal lawmakers during their spring break .
the executive branch wants them to support the pact , and , at the very least , not to meddle in foreign affairs .
white house today said administration officials would hold classified briefings with members of congress .
at the white house , obama today met with jewish leaders and donors in a separate attempt to woo their support for the accord .