6, citing three sources close to Trump.Trump, who won the presidential vote on Nov. 5, has repeatedly said that he would end the war within "24 hours" and get the U.S. "out" of Ukraine. Earlier media reports and statements from Trump's inner circle indicated this would entail freezing the war on the current front lines and creating a demilitarized zone in the east, a claim also supported by the WSJ's sources.Russia currently occupies roughly 20% of Ukrainian territory in the south and the east and continues steadily pushing back Ukrainian defenders, albeit at the cost of heavy losses.It remains unclear who would police the 800-mile (1,300 kilometers) long demilitarized zone, but an undisclosed Trump's aide told the WSJ that Washington would demand European allies to send in their troops.This proposal is only one of the ideas circling around in Trump's team, and the president-elect has a tendency to make major policy decisions on the spot, the sources said.Two of Trump's advisors, retired General Keith Kellogg and Fred Fleitz, proposed in June to cease military aid to Ukraine unless it agrees to hold peace negotiations with Russia.At the same time, Kellogg said the plan would entail additional warnings to Russia that the U.S.