No good reason for Senate to wait for Pelosi?

Red States:

Dershowitz: Senate Doesn’t Have to Wait While Pelosi Plays Games and Sits on Articles
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According to Dershowitz:

I believe that the Senate need not wait for articles of impeachment to be transmitted. Senators are empowered by the constitution to begin a trial now — with or without further action by the House. Just as the House has the “sole power of impeachment,” so too the Senate has the “sole power to try all impeachments.”

The current Senate rules from 1986 say that the Senate will act immediately to set a trial date once they are presented with the articles of impeachment.

But Dershowitz notes, that’s not in the Constitution and can change as the Senate decides. “The Senate can make its own rules (as long as they are consistent with the Constitution) and establish its own timetables.”
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While Dershowitz did agree that Trump was impeached, he said Tribe was more off because of his bias and he said that Pelosi’s actions were unconstitutional.

Sorry, but the Constitution does not permit that partisan, result-oriented ploy. Either Trump has been impeached and is entitled to a Senate trial; or he has not been impeached and is entitled to a clean slate.

My own view is that in the public eye, President Trump has been impeached by a partisan vote and he is now entitled to be acquitted, even if the Senate vote is as partisan as the House vote. The partisans who voted his impeachment along party lines in the House, have no principled argument against a party-line acquittal. The Democrats devised the partisan rules of engagement in the House. They can’t suddenly demand a change in those rules because they are a minority in the Senate.

So there are only two constitutionally viable alternatives: either Pelosi must announce that Trump has not been impeached; or the Senate must initiate a trial. Preserving the status quo indefinitely — Trump remaining impeached without having a trial —is unconstitutional and should not be tolerated by the American people.

Basically, if she doesn’t move and wants to hang the process, move without her, since the Senate has complete control of the trial. Then you could have a trial and immediately move to dismiss or call what witnesses you choose.
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The question may be whether the Senate will act on its own.  At this point it looks like McConnell is willing to wait out Pelosi.