Trump lawyers raise defenses as pressure grows for witnesses
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Sen. Susan Collins, R-Maine, departs the Senate following defense arguments by the Republicans in the impeachment trial of President Donald Trump on charges of abuse of power and obstruction of Congress, at the Capitol in Washington, Saturday, Jan. 25, 2020. Collins, a moderate up for re-election, has said she is "likely" to want to hear from witnesses in the impeachment trial, a move which would put her at odds with Senate Majority Leader Mitch McConnell, R-Ky. (AP Photo/J. Scott Applewhite)