The Set-Up: Trump can't deliver on a peace deal because RUSSIA doesn't want peace; it wants Ukraine.
And so because of Trump's promises that only he can "fix it" and could do so in "one day," he and Vance (and with a little help from MTG's boyfriend) concocted a scheme to place all the blame on the failure of a peace deal on Zelenskyy instead of where it really belongs: Russia.
It also gives Trump an excuse to have Congress cut-off military funding for Ukraine, which he only supported during his first term after being backed into a corner when his attempts to first hold the aid hostage in exchange for political dirt on Joe and Hunter Biden were exposed (and which led to his first impeachment).
It also gives Trump an excuse to have Congress cut-off military funding for Ukraine, which he only supported during his first term after being backed into a corner when his attempts to first hold the aid hostage in exchange for political dirt on Joe and Hunter Biden were exposed (and which led to his first impeachment).