US President Donald Trump sought help from Xi Jinping to win the upcoming 2020 election, “pleading” with the Chinese president to boost imports of American agricultural products, according to a new book by former national security adviser John Bolton. The accusations were included in an excerpt from The Room Where It Happened: A White House Memoir, which is set to be released on June 23. Bolton also wrote that Trump demonstrated other “fundamentally unacceptable behaviour”, including privately…