The Kremlin has not revealed the agenda for the upcoming phone call between President Putin and President Trump. The call, scheduled for Tuesday, will be the first known conversation between the two leaders since Mr. Putin laid out conditions for a cease-fire in Ukraine. While Mr. Trump has expressed his desire for a truce, Mr. Putin seems to be seeking more concessions. Moscow's recent push to drive out Ukrainian troops from the Kursk region has weakened Kyiv's bargaining power in potential negotiations.