David Cameron’s effort to convince former President Donald Trump to allow the U.S. Congress to advance $60 billion in military aid for Ukraine seems unsuccessful, as the U.K. foreign secretary was denied a meeting with congressional speaker Mike Johnson, the Guardian reports. During a private dinner at Trump’s Florida retreat, Mar-a-Lago, Cameron had pressed Trump to acknowledge the importance of not rewarding Vladimir Putin for annexing Ukrainian territory, emphasizing that it was in the United States’ best interest. Cameron stressed the need for every NATO member to meet or exceed the defens…