Shortly after the elections, Gingrich, who had been one of the leading advocates for impeachment, announced he would resign from Congress as soon as he was able to find somebody to fill his vacant seat; Gingrich fulfilled this pledge, and officially resigned from Congress on January 3, 1999.
The Rock continued to feud with Mankind over the WWF Championship, which was traded back and forth between them. First, in the main event of the January 4, 1999 episode of Raw Is War, Mankind defeated The Rock after interference from Stone Cold Steve Austin.
The Senate trial began on January 7, 1999, with Chief Justice of the United States William Rehnquist presiding. The first day consisted of formal presentation of the charges against Clinton, and of Rehnquist swearing in all arguants in the trial.
On the following day, Rep. Bryant moved to call witnesses to the trial, a question that the Senate had scrupulously avoided to that point. In both cases, the Senate voted to deliberate on the question in private session, rather than public, televised procedure.
On January 27, the Senate voted on both motions in public session; the motion to dismiss failed on a nearly party line vote of 56–44, while the motion to depose witnesses passed by the same margin.
A day later, the Senate voted down motions to move directly to a vote on the articles of impeachment and to suppress videotaped depositions of the witnesses from public release, Senator Russ Feingold voting with the Republicans.
On 30 January 1999 NATO issued a statement announcing that the North Atlantic Council had agreed that "the NATO Secretary General may authorize air strikes against targets on FRY territory" to "[compel] compliance with the demands of the international community and [to achieve] a political settlement".
Also on 30 January 1999 the Contact Group issued a set of "non-negotiable principles" which made up a package known as "Status Quo Plus"—effectively the restoration of Kosovo's pre-1990 autonomy within Serbia, plus the introduction of democracy and supervision by international organisations.
On January 31, during an episode of Sunday Night Heat, Mankind pinned The Rock using a forklift truck in an Empty Arena match to win the WWF title. This match was referred to as "Halftime Heat" as it was televised during halftime of that year's Super Bowl.