The Los Angeles Times reports:
Beneath the heated argument of whether the House should have a formal resolution to open an impeachment inquiry is a potential benefit for Republicans, if they can force a vote: the chance to subpoena their own witnesses and information.
In both the Nixon and Clinton impeachment inquiry resolutions, the minority party on the investigating committee was granted the power to subpoena — something the minority party does not normally have. Subpoenas were still subject to a vote of the committee, giving the majority party a way to block them.
If similar language were included in a House impeachment inquiry resolution against President Trump — which is what Republicans are pushing for — it would theoretically enable GOP members to, say, subpoena testimony or information from former Vice President Joe Biden, or his son Hunter, or try to take the inquiry into an entirely different direction.