Senate Republicans, including potential swing-voters, expressed outrage Friday after lead House Impeachment Manager Adam Schiff, D-Calif., referred in his closing remarks at President Trump's Senate impeachment trial to a report that GOP members were told they'd face dire consequences if they voted to convict the president.

H/T: Fox News

GOP senators are heard yelling “that’s not true” when House manager Adam Schiff cites a CBS report claiming Pres. Trump told them their heads “will be on a pike” if they voted against him. pic.twitter.com/wrXI4KhGPR — Alex Salvi (@alexsalvinews) January 25, 2020

Even Sen. Lisa Murkowski, who is widely seen as sympathetic to the Democrats' argument that additional witnesses should testify in the Senate, thought it was over the top.

"I thought he was doing fine with [talking about] moral courage until he got to the 'head on a pike.' That's where he lost me,” said Murkowski to reporters. “He's a good orator. ... It was just unnecessary.”

Republicans are VERY angry about Schiff’s decision to reference that CBS “head on a pike” report. Murkowski says “that’s where he lost me.” Barrasso says “whatever gains he may have made, he lost all of it — plus some — tonight.” — Emily Cochrane (@ESCochrane) January 25, 2020

In another sign that Schiff's remarks may have backfired on the Democrats, Republican Sen. Susan Collins was also reportedly outraged, yelling "NOT TRUE" as he made the remarks. Collins is another potential Democrat flip in their impeachment efforts.

SUSAN COLLINS yelled out, NOT TRUE when Adam Schiff made the comment about the head on the Pike, she claims to be concerned that we have a fair trial. Did she ever yell out ANYTHING when Trump was telling one of his 15,413 lies to the American People? If she did, I missed it. https://t.co/aXVvLcVkXo — Joel Bowden (@joimbow) January 25, 2020

“That’s not true,” Susan Collins said several times on the floor, shaking her head when Schiff cited a news report saying WH warned senators that a vote against Trump means “your head will be on a pike.” Risch also said aloud: “That’s not true.” Cotton laughed when Schiff said it — Manu Raju (@mkraju) January 25, 2020