Trump and Putin can negotiate as much as they want about the division of Ukraine, but this will not have any meaning for Ukraine. The Armed Forces of Ukraine and Zelensky as the President of Ukraine will decide on what conditions and when to end the war with Russia.
Time will tell...
Are we back to this again? During Trump's first term, they also tried to scare us by saying that Trump would start World War III, and it wasn't with him that we were on the brink—it was with Biden.
Although there really is no difference between Trump and Biden but you are forgotting that on January 2020 he ordered a terrorist attack that killed an Iranian general (with his Iraqi counterpart) on an official mission to Iraq to discuss the operations to eliminate the remainder of US backed ISIS terrorists inside Iraq.
Iran started a series of retaliations as the response to that act of terror that included elimination of various US military officers that were involved in that terrorist attack. But the main one that could be called "being at the brink" was to carry out what Pentagon calls the largest ballistic missile attack to that date; it was on 2 US military bases with over a hundred US servicemembers eliminated and nearly a thousand incapacitated in a blinking of an eye.
If Trump hadn't been scared shitless of Iran's military power back in 2020 and had tried showing any kind of aggression, a World War would have started...