An influential group of GOP hawks has launched a behind-the-scenes lobbying offensive pressing President Donald Trump to not only back off his administration’s quest for a nuclear deal with Iran, but greenlight an attack on Tehran by Israel.

The campaign is raising alarms among Trump and his allies, who have launched a counteroffensive to keep the president’s diplomacy on track.

During a private lunch with the president at the White House last Wednesday, conservative talk show host Mark Levin told Trump that Iran was days away from building a nuclear weapon, an argument Trump’s own intelligence team has told the president is not accurate, according to an intelligence official as well as another Trump ally familiar with the matter. Levin urged Trump to allow the Israeli government to strike Iranian nuclear sites, which Trump has told Israeli Prime Minister Benjamin Netanyahu would torpedo the diplomacy.