BRUSSELS (AP) — European leaders have praised President Donald Trump for agreeing to allow U.S. military support for a force they are mustering to police any future peace in Ukraine — a move that vastly improves the chances of success for an operation that could prove essential for the country's security.The leaders said Trump offered American military backup for the European “reassurance force” during a call they held with him ahead of his planned summit with Russian President Vladimir Putin on Friday. They did not say what the assistance might involve, and Trump himself has not publicly confirmed any support.The...