There were 4 Articles of Impeachment drawn up by the House's Committee on the Judiciary, and 2 of them passed the full House, with a 2/3rds' majority, of the Senate, 67 out of 100, required to vote "Guilty" in order to remove him from office:
* Perjury before a grand jury: 55 Nay, 45 Yea. All Democrats voted Nay. Republicans voting Nay: Ted Stevens of Alaska, Richard Shelby of Alabama, Olympia Snowe and Susan Collins of Maine, Arlen Specter of Pennsylvania, John Chafee of Rhode Island, Fred Thompson of Tennessee, Jim Jeffords of Vermont, John Warner of Virginia, and Slade Gorton of Washington.
Specter had been a Democrat until switching parties as a young prosecutor in 1965, and would switch back in 2009. Shelby had been a Democrat until 1994, when the Republicans won the Congressional majority, and he cowardly joined them. Chafee died later in the year, and was succeeded by his son, Lincoln Chafee, who later switched parties. Jeffords switched parties in 2001.
* Obstruction of Justice: 50 Yea, 50 Nay. All Democrats voted Nay. This time, Stevens, Shelby, Thompson, Warner and Gorton voted to convict, while the other Republicans stayed consistent.
The case was based on Clinton's attempt to hide the fact that he had an extramarital relationship with Monica Lewinsky, a former White House intern. It had nothing to do with using the power of his office to commit election fraud, as was the case with Richard Nixon, who resigned in 1974 before the full House could vote on Articles of Impeachment; and with Donald Trump, who was impeached in 2019 and acquitted early the next year.
The evidence against Clinton was so ridiculous, the Republicans, who held the majority, could not get a majority, 51 votes, to say that he had done it. Surely, there were some Senators who knew he was innocent, but voted "Guilty" anyway, because, like the leaders of the impeachment movement in the House, they hated him so much.
And yet, with Speaker Newt Gingrich having resigned before the impeachment, once the trial was over, things calmed down considerably. Over the last 2 years of Clinton's Administration, the White House and the Congress worked together much better, got some things done, and kept the good economy going. It can be argued that, by the end of the year, decade, century and millennium, America had never been in better shape. Maybe, it still hasn't.
Of the 50 Republican Senators who voted "Guilty" on at least 1 Article of Impeachment, 3 are still serving in the Senate, 25 years later:
* Chuck Grassley of Iowa, elected with the "Reagan Robots" Class of 1980, now the last remaining member of that class, and the longest-serving active Senator.
* Mitch McConnell of Kentucky, elected in 1984, the 2nd-longest-serving active Senator, and the Republicans' longest-serving Senate Leader, in that post 2007.
* And Mike Crapo of Idaho, who had been elected to the Senate just before the Impeachment vote, and thus voted to both successfully impeach Clinton in the House and unsuccessfully convict him in the Senate. (And that's pronounced KRAY-poh, not CRAP-o, although confusion would be understandable.)