This rule states that the Senate may convene an impeachment committee to review the evidence and hear witnesses, and report their findings back to the full Senate.
When it was first used in a judicial impeachment, it was challenged in the courts. SCOTUS ruled that the rule was Constitutional because the Senate has the power to make its own rules, and that includes the rules for impeachment trials.
Now, can you imagine McConnell letting the Senate exercise this rule for a Presidential impeachment and let the Senators delegate impeachment to a subcommittee while the rest go campaigning?
-PJ
I can imagine doing practically anything. He doesn’t seem beholden to anyone.