The Dims have tried to impeach every GOP President since Eike.
From Wiki
1. Nixon. Nuff said
2. Reagan. On March 6, 1987 Rep. Henry B. Gonzalez, Democrat of Texas, introduced articles of impeachment against President Ronald Reagan regarding the Iran Contra affair, leading to the joint hearings that dominated the summer. A special prosecutor was appointed.
3. Bush Sr. On January 16, 1991, Congressman Henry B. Gonzalez introduced H. Res. 34, to impeach President George H. W. Bush for starting the Gulf War. The resolution was referred to the Judiciary Committee, where it died.[18] Gonzalez tried again with H. Res. 86 on February 21. Both bills were referred to the Subcommittee on Economic and Commercial Law March 18, 1992, where the efforts also died.
4. "W". Due to the Wars in Afghanistan and Iraq, President George W. Bush and other officials were targets of impeachment efforts. None of these efforts advanced past the hearing stage.
5. Trump. Within weeks of taking office, members of Congress had declared that President Trump may have committed impeachable offenses in relation with Executive Order 13769.[25]
On May 17, 2017, Representative Al Green (D) of Texas called for impeachment of President Trump on the House floor.[26] Later, just under six months into Trump's presidency, Representative Green and Representative Brad Sherman introduced H. Res. 438, exhibiting one article of impeachment.
Representative Steve Cohen, one of six[27] Democrats introducing five articles of impeachment, said on November 15, 2017, "[H]is train of injuries to our Constitution must be brought to an end."[28] The five accusations were "obstruction of justice", "violation of the foreign emoluments clause", "violation of the domestic emoluments clause", "undermining the independence of the federal judiciary" and "undermining the freedom of the press".[27] Many Democrats opposed this action.[28]
The first vote on the subject was held on December 6, 2017, when a second privileged resolution (H.Res.646) was tabled by a vote of 364 to 58 with four voting "present".[29][30]
The second vote on the subject was held on January 19, 2018, when the third privileged resolution offered by Representative Green (H.Res.705) was tabled by a vote of 355 to 66, with three voting “present”[31]
Several Chairs of certain House committees have promised hearings on impeachment-related issues starting in January 2019. The first of several resolutions presenting articles of impeachment was introduced as soon as the 116th congress was convened.[32]
Well, they're apparently not very good at it.