"This is a very dangerous moment. I don't think it sends a very good signal if the U.S. pulls out. We really hope that President (Donald) Trump will support Ukraine and put pressure on Russia," Zelensky said.Zelensky also stressed that Ukraine is an ally of the U.S., while Russia is an enemy.Earlier, U.S. Secretary of State Marco Rubio said that the U.S. will cease its attempts to negotiate a peace deal between Ukraine and Russia in the following days if there is no signal that an agreement is reachable.Rubio added that Trump is interested in reaching a deal but has other priorities as well.The final version of Trump's peace plan, which he wants Russia and Ukraine to sign off on, requires significant concessions from the latter.According to the peace proposal, the United States would de jure recognize Russia's control over occupied Crimea and de facto accept Russia's partial occupation of Ukrainian territories in Luhansk, Donetsk, Kherson, and Zaporizhzhia oblasts.Kyiv must also give up its aspirations to join NATO.Zelensky has already ruled out recognizing Crimea as Russian territory, after which U.S.