President Donald Trump asked Chinese President Xi Jinping to help him win reelection in 2020 by purchasing agricultural products from key U.S. states, former National Security Adviser John Bolton wrote in his new tell-all book.

During a Group of 20 summit meeting in Japan last summer, Trump was “pleading with Xi to ensure he’d win,” Bolton wrote in an excerpt of the book published Wednesday in The Wall Street Journal.

Trump stressed the importance of farmers and of “increased Chinese purchases of soybeans and wheat” in his electoral success, Bolton wrote.

He added:

Trump’s conversations with Xi reflected not only the incoherence in his trade policy but also the confluence in Trump’s mind of his own political interests and U.S. national interests. Trump commingled the personal and the national not just on trade questions but across the whole field of national security. I am hard-pressed to identify any significant Trump decision during my White House tenure that wasn’t driven by reelection calculations.

Bolton said he reported such incidents to Attorney General William Barr and White House Counsel Pat Cipollone, The New York Times reported.

Neither the Justice Department nor the White House immediately responded to HuffPost’s requests for comment.