And if impeachment DOES happen, and they take it to the senate, then being the majority party the Republicans can set up THEIR schedule, which would include one hell of a lot of subpoenas to people who were involved in the "reason" impeachment happened in the first place. Since it ostensibly happened because of Ukrainian and, in extension, Russian collusion, they can subpoena EVERYONE, such as Clapper, Brennan, both Clintons, Lynch, Comey, Stzrok, Lisa Page, both Bidens, and a whole slew of other idiots. And being a presidential removal trial of an impeached president, the Senate can instruct the DOJ to ENFORCE the subpoena orders at risk of federal Jail time. That would essentially be one humongous in-kind donation to every Republican running for federal office.