The White House is pressuring Ukraine to sign on to its new peace proposal by Thanksgiving or lose U.S. support to the country, according to two officials familiar with the talks, speaking on the condition of anonymity to describe sensitive diplomatic discussions.

U.S. Army Secretary Daniel Driscoll presented Ukrainian President Volodymyr Zelensky on Thursday with a version of the 28-point plan President Donald Trump’s special envoy Steve Witkoff recently drafted with Russian envoy Kirill Dmitriev. That plan, which has been leaked in the press and confirmed by several officials, included several red lines for Ukraine, including a massive reduction of its army size and ceding territory to Russia that it has not yet conquered militarily.