WASHINGTON — Under pressure from Republicans and Democrats, the Trump administration on Thursday turned over to Congress a list of Russian-connected entities it is considering subjecting to new sanctions that are meant to rebuke Russia for actions in Eastern Europe and for meddling in the 2016 presidential election.

Administration officials also made clear to lawmakers that they intended to impose sanctions on individuals in the United States and elsewhere who did “significant’’ business with the Russian entities, sending an early warning that such deals must soon end.

The list appeared to be an attempt to mollify critics — including Senators John McCain, Republican of Arizona, and Benjamin L. Cardin, Democrat of Maryland — who said that the administration had not moved quickly enough to punish a key American adversary, using legislation passed in July and signed in August by Congress. That legislation required that the administration produce a list of entities by Oct. 1.

Administration officials said the list was not itself an imposition of sanctions, but rather the government’s assessment of organizations or persons “that are part of, or operating for or on behalf of, the defense or intelligence sectors of the government of the Russian Federation.’’ Officials said a formal decision on sanctions would come in the future.

The list, a copy of which was obtained by The New York Times, reads like a Who’s Who of the Russian defense and intelligence sectors. It includes the United Aircraft Corp., which makes Sukhoi jets and Tupolev passenger airliners; Kalashnikov Concern, which makes the famed assault weapon used around the world; and Rosoboronexport, the chief state-owned arms exporter in the country.

Democrats and several powerful Senate Republicans, led by McCain, had grown frustrated over the delay in recent days. McCain, a fierce critic of Russia, threatened to use his position as the chairman of the Armed Services Committee to try to force the administration to comply.

The Trump administration answered the criticisms with assurances that it was working to draw up a list of targets, but that with minimal staff in place in the State Department and given the complexity of the legislation, it was taking longer than the law allowed for.

Meanwhile, the Republican-led House overwhelmingly approved bipartisan legislation Thursday that would slap new sanctions on Iran for its pursuit of long-range ballistic missiles without derailing the 2015 international nuclear accord that Trump has threatened to unravel.

Representatives Ed Royce and Eliot Engel sponsored the bill, which requires the Trump administration to identify for sanctions the companies and individuals inside and outside of Iran that are the main suppliers of Tehran’s ballistic missile programs.

Lawmakers voted 423-2 to pass the measure.

Royce, a California Republican, is chairman of the Foreign Affairs Committee and Engel, who is from New York, is the panel’s top Democrat. Both opposed the nuclear agreement when it was forged two years ago, but neither lawmaker is in favor of ditching the deal now.

Lawmakers are aiming to hold Iran accountable for what they say is reckless, destabilizing behavior while they debate how to meet Trump’s new demands for fixing what he and other Republicans argue are serious flaws with the nuclear agreement.

Royce has said that despite the deal’s defects, he wants the United States and other nations that are party to the accord to ‘‘enforce the hell out of it.’’ That includes making certain that international inspectors have better access to possible nuclear sites in Iran, according to Royce, and addressing ‘‘sunset’’ provisions in the agreement that will begin to expire in year 10 of the accord, heightening concerns Iran may be able to build an atomic bomb even before the end of the pact.

Engel has said unwinding the agreement would send a dangerous signal to allies and adversaries alike. He backs aggressive policing of the agreement to ensure Iran doesn’t violate the terms.

The House vote comes less than two weeks after Trump refused to certify that Iran is complying with the accord, which is aimed at preventing Iran from assembling an arsenal of atomic weapons. But Trump, breaking his campaign pledge to rip up the agreement, did not pull the United States out or reimpose nuclear sanctions against Iran.

Trump instead punted the issue to Congress, instructing lawmakers to toughen the law that governs US participation in the deal and calling on the other parties to the accord to fix a series of deficiencies.

Material from the Associated Press was used in this report.