By Dave Goldiner

New York Daily News

John Bolton, the former national security adviser who was fired by President Donald Trump, is reportedly negotiating to testify in the impeachment inquiry.

The foreign policy hawk is in talks over giving testimony to the Democratic-led investigation, CNN reported, in what would be a bombshell appearance that could be the most devastating blow yet to Trump.

Bolton, a blunt-spoken proponent of a hard line on Russia and other geopolitical rivals, fiercely resisted Trump’s suspension of defense aid to Ukraine in a scheme to force Ukraine to open investigations into his Democratic rivals.

Impeachment witnesses have quoted Bolton as deriding Trump lawyer Rudy Giuliani’s efforts to dig up dirt on Joe Biden as “drug deals” and urged staffers at the National Security Administration to report the improper trade-off to administration lawyers.

Bolton would bring a serious dose of conservative star power to the impeachment drama that has so far been dominated by little-known diplomats.

Bolton is best known as a key architect of the war in Iraq and as a hard right-winger who makes no apologies for exercising American power overseas.

He joined the Trump White House as national security adviser in March 2018, but was shown the door last month after disputes over relations with Ukraine, North Korea and Afghanistan.