For once, he may be on the wrong side of a power dynamic.
To use power, you must have it.
On the night of Justice Ruth Bader Ginsburg's death, Senate Majority Leader Mitch McConnell announced that a Trump nominee to replace Ginsburg would receive a vote on the floor of the Senate.
That announcement promised a use of power without hesitation or compunction, an abrupt reversal of the supposed rule that blocked an Obama nomination nine months before the 2016 election. This supposed rule would seem much better justified in 2020 than 2016. This time, the vacancy has occurred only 46 days before an election. This time, the party of the president making the nomination seems likely to lose, not win. This time, the Senate majority to approve the nomination may lose too.