Trump takes another shot at NATO as he prepares to meet with alliance leaders

President Donald Trump said Tuesday that an upcoming summit with Russian President Vladimir Putin might be easier than a gathering with NATO allies, as he left the White House for a week of high-profile diplomacy in Europe.

In a series of tweets and comments to reporters before departing, Trump took fresh aim at other NATO members for not meeting targets for defense spending, saying the arrangement was unfair to U.S. taxpayers.

His trip to Europe will also include a meeting in Britain with Prime Minister Theresa May, whose government is in disarray after a pair of key resignations, as well as a weekend of golf in Scotland.