John Kelly: 'I believe John Bolton'

At an event in Sarasota, Fla., on Monday, former White House chief of staff John KellyJohn Francis KellyMORE said he believes the accounts detailed in former national security adviser John BoltonJohn BoltonBolton on impeachment: 'My testimony would have made no difference to the ultimate outcome' Overnight Defense: Dem senator met with Iranian foreign minister | Meeting draws criticism from right | Lawmakers push back at Pentagon funding for wall We should listen to John Bolton MORE’s memoir. 

“If John Bolton says that in the book, I believe John Bolton,” Kelly said at the event, according to the Sarasota Herald-Tribune. “Every single time I was with him ... he always gave the president the unvarnished truth” he said. 

“So, I think if there are people that could contribute to this, either innocence or guilt ... I think they should be heard,” Kelly said at the Florida event. “I think some of the conversations seem to me to be very inappropriate, but I wasn’t there. But there are people that were there that ought to be heard from” the former military general continued. 

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Kelly's comments come after The New York Times obtained a manuscript of Bolton's unpublished memoir Sunday. In the manuscript the former national security adviser reportedly claims President TrumpDonald John TrumpChasten Buttigieg: 'I've been dealing with the likes of Rush Limbaugh my entire life' Lawmakers paint different pictures of Trump's 'opportunity zone' program We must not turn our heads from the effects of traumatic brain injuries MORE personally told him he wanted to withhold about $400 million in military aid to Ukraine until it investigated the president's political rivals, including former Vice President Joe BidenJoe Biden'Where's your spoon?' What we didn't learn in the latest debate Sanders nabs endorsement from Congressional Hispanic Caucus member Poll: Sanders holds 7-point lead in crucial California primary MORE and his son, Hunter Biden.

Trump's dealings with Ukraine are at the center of his current impeachment trial in the Senate.

The new revelation from Bolton raises questions about whether new witnesses will be called to give testimony in the coming proceedings. 

Since the Times reported the contents of the manuscript, more pressure has been on key moderate Republicans to vote for witnesses in the Senate impeachment trial. 

Sen. Mitt RomneyWillard (Mitt) Mitt RomneyDemocratic Senate campaign arm raised more than .5 million in January On the Trail: Senate GOP hopefuls tie themselves to Trump Trump looms as flashpoint in Alabama Senate battle MORE (R-Utah) told reporters on Monday that it’s “increasingly likely” the Senate will vote to bring in witnesses. However, Rep. Mark MeadowsMark Randall MeadowsLawmakers grill Census Bureau officials after report on cybersecurity issues Conservative lawmakers warn Pelosi about 'rate-setting' surprise billing fix House GOP leader says reassignment of Vindman was appropriate MORE (R-N.C.), a close ally of the president, said members who vote for witnesses could "face political repercussions," while other GOP senators have said it’s appropriate for members to get a copy of the manuscript

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Kelly was White House chief of staff until January 2019, and was later replaced by former Office of Management and Budget Director Mick MulvaneyJohn (Mick) Michael MulvaneyMulvaney calls out GOP for being 'a lot less interested' in deficits under Trump than Obama: report Overnight Health Care: Senate panel to hold hearing on US coronavirus response | Dems demand Trump withdraw religious provider rule | Trump Medicaid proposal sparks bipartisan backlash Democratic senators urge Trump administration to request emergency funding for coronavirus response MORE, who is on the list of people Democrats would like to see testify before the Senate. 

Trump was impeached on two charges: abuse of power and obstruction of Congress.

The Senate trial is in its seventh day of proceedings. Tuesday is the last day that Trump's defense team has to present their opening arguments.