That may be part of the reason, but I suspect the real reason is that they want to energize their base and they want to distract from the litany of known abuses and corruptions that occurred under the Obama administration.
When Trump gets the open field - he hasn’t had it yet - he will wreak devastation on them. Remember he was mired in that whole Mueller fiasco for 2 years, and then the very day after Mueller’s testimony collapsed the Russia Hoax on their heads they concocted this Ukraine narrative. The very next day! They have been relentless.
This is their last shot. After this, payback.
“...they want to distract from the litany of known abuses and corruptions that occurred under the Obama administration.”
They want to do more than distract ... they want to prevent the light of day from exposing the demokraps’ criminal enterprise and the handcuffs.
Yes. But he also tossed them some red meat. He announced that Rudy would look into Ukranian corruption, and when Rudy did that, he knocked over a few apple carts. Impeachment was coming and this gets it over with fairly quickly.