Ever since he met Kim Jong Un in Singapore last year, President Donald Trump has shown a tendency the North Korean leader is sure to try and exploit: making unexpected concessions in one-on-one meetings.
There was the December phone call with Turkey’s president, when Trump surprised his own aides -- and prompted Defense Secretary Jim Mattis’s resignation -- by suddenly agreeing to pull troops out of Syria. And last year’s joint press conference with Russian President Vladimir Putin, when Trump all but dismissed his own intelligence community’s findings on Russian hacking of the 2016 election.
Heading into next week’s summit with Kim

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