Former United Nations Ambassador John Bolton says he is no longer able to see President Trump.

"I requested a meeting with him and I was turned down," Bolton told Politico.

In a piece published Monday in the National Review, Bolton expanded on his inability to see the president.

"I offer the Iran nonpaper now as a public service, since staff changes at the White House have made presenting it to President Trump impossible," Bolton wrote as he laid out a plan to get out of an international agreement between Iran and world powers that exchanged sanctions relief for concessions on Iran's nuclear program.

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"Although he was once kind enough to tell me 'come in and see me at any time,' those days are now over."

Bolton had previously been eyed for some administration positions, including secretary of State and national security adviser.

In his op-ed, he wrote that former chief strategist Stephen Bannon had asked him to "draw up" for Trump a "game plan" for the Iran nuclear agreement, but he has not been able to present it to the president.

"Here it is. It is only five pages long, but like instant coffee, it can be readily expanded to a comprehensive, hundred-page playbook if the administration were to decide to leave the Iran agreement," Bolton wrote.

"There is no need to wait for the next certification deadline in October. Trump can and should free America from this execrable deal at the earliest opportunity."

Bolton wrote if the president never sees his option, "so be it."

"But let it never be said that the option didn't exist," he wrote.