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Ahead of a meeting with Vice President Mike Pence, British Foreign Secretary Boris Johnson said he does not want the U.S. to pull out of the Iran nuclear deal.

Johnson spoke to "Fox & Friends" Monday before his talks with the Trump administration, acknowledging that Iran is "behaving badly" and the agreement's "flaws" must be fixed. 

He said President Trump should object to the deal's sunset clause - which automatically lifts most key restrictions by 2030 - arguing it would allow Iran to "go forward fast with enrichment programs that could lead to a nuclear weapon."

"You have got to do that without just throwing the baby out with the bath water, without scrapping the whole thing. Because if you do that, you have to answer the question, what next? What if the Iranians do rush for a nuclear weapon?" he asked, raising the prospect of having to bomb the facilities. 

"There doesn't seem to me at the moment to be a viable military solution," he added.

Trump is weighing whether to withdraw the U.S. from the agreement by a May 12 deadline. The leaders of Germany and France, in recent visits to the White House, lobbied Trump not to withdraw.

Johnson is expected to discuss Iran, North Korea and Syria in talks with Pence, White House National Security Adviser John Bolton and other senior administration officials and congressional leaders. 

In a speech to the NRA on Friday, Trump blasted the Obama administration for entering into a deal with a country where people chant "Death to America."

Former Secretary of State John Kerry reportedly has been engaged in “shadow diplomacy” with European and Iranian officials in a last-ditch effort to save the agreement. 

Watch the interview above.

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