Sen. Lindsey GrahamLindsey Olin GrahamDemocrats hammer abuse of power charge, allege Trump put self over country Video becomes vital part of Democrats' case against Trump Nadler plays 1999 clip of Graham defining high crimes: 'It doesn't even have to be a crime' MORE (R-S.C.) joked that Wednesday's first Democratic presidential debate made a third term for President TrumpDonald John TrumpSchiff pleads to Senate GOP: 'Right matters. And the truth matters.' Anita Hill to Iowa crowd: 'Statute of limitations' for Biden apology is 'up' Sen. Van Hollen releases documents from GAO investigation MORE look "better and better."

“After tonight’s #DemocraticDebate.......that whole Trump 3rd term thing is looking better and better,” Graham tweeted Wednesday night.

By Thursday, #LindseyGrahamResign began trending on Twitter, with hundreds urging the senator to step down.

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“Third term for Trump you have lost your mind [and] now you need to lose your seat,” one user tweeted, while another user called Graham, a frequent defender of Trump, an “absolute loser.”

Jaime Harrison, the former chairman of South Carolina’s Democratic Party who is challenging Graham in 2020, blasted Graham on Thursday, tweeting: “Senator Graham, in SC we have spines. Do us a favor and find yours.”

“When your only concern is covering your political ass — you joke about undermining the US Constitution, sell out your constituents, and abandon your moral compass,” Harrison wrote.

#LindseyGrahamResign also trended in May, when Graham, the Senate Judiciary Committee chairman, said Trump’s son, Donald Trump Jr.Donald (Don) John TrumpComedians post fake Army recruitment posters featuring Trump Jr. Trump Jr., Ivanka garner support in hypothetical 2024 poll FWS: There's 'no basis' to investigate Trump Jr.'s Mongolian hunting trip MORE, should refuse to answer questions from the Senate Intelligence Committee, which subpoenaed him to testify about his communication with Russian officials.

“You just show up and plead the Fifth and it’s over with,” Graham said.