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Gardner says he will oppose new witnesses in Trump impeachment trial

Sen. Cory GardnerCory GardnerBiden administration reverses Trump changes it says 'undermined' conservation program Gardner to lead new GOP super PAC ahead of midterms OVERNIGHT ENERGY: Court rules against fast-track of Trump EPA's 'secret science' rule | Bureau of Land Management exodus: Agency lost 87 percent of staff in Trump HQ relocation | GM commits to electric light duty fleet by 2035 MORE (Colo.), a vulnerable GOP senator up for reelection this year, said Wednesday that he will oppose any effort to call new witnesses as part of President TrumpDonald TrumpTrump's Facebook ban to stay in place, board rules Trump allies launching nonprofit focused on voter fraud DOJ asks for outside lawyer to review Giuliani evidence MORE's impeachment trial.

Gardner, in a statement to Colorado Politics, said he did not "believe we need to hear from an 18th witness," referring to individuals called during last year's House impeachment inquiry.

"I have approached every aspect of this grave constitutional duty with the respect and attention required by law, and have reached this decision after carefully weighing the House managers and defense arguments and closely reviewing the evidence from the House, which included well over 100 hours of testimony from 17 witnesses," he added. 
 
Gardner has been critical of the House impeachment process for months, but his opposition to new witnesses comes as Republicans face intense external pressure to call former national security adviser John BoltonJohn BoltonRepublicans request documents on Kerry's security clearance process Trump pushes back on Bolton poll Hillicon Valley: Facebook Oversight board to rule on Trump ban in 'coming weeks' | Russia blocks Biden Cabinet officials in retaliation for sanctions MORE.
 
Bolton, in a draft of his forthcoming memoir, will reportedly claim that Trump tied Ukraine aid to the country announcing investigations into political opponents, including former Vice President Joe BidenJoe BidenCensus results show White House doubling down on failure Poll: Americans back new spending, tax hikes on wealthy, but remain wary of economic impact True immigration reform requires compromise from both sides of the aisle MORE and his son Hunter Biden.
 
 
Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellSchumer works to balance a divided caucus's demands Lobbying world The Memo: Biden moves into new phase of COVID-19 fight MORE (R-Ky.) has not yet said he has the 51 votes — or 50 votes if Chief Justice John Roberts does not break a tie — to defeat a call for new witnesses.
 
But Republicans are feeling newly confident that they will be able to avoid a messy witness fight.