Donald Trump is questioning the effectiveness of the United Nations, saying it’s just a club for people to after the U.N. Security Council voted last week to condemn Israeli settlements in the West Bank and east Jerusalem, The decision by the Obama administration to abstain from Friday’s U.N. vote brushed aside Trump’s demands that the U.S. exercise its veto and provided a climax to years of icy relations with Israel’s leadership. That was only one subject on which Trump tweeted Monday.