Nikki Haley: Top aides “told ex-UN envoy to undermine Trump”
"It was their decisions, not the president's, that were in the best interests of America, they said
Trump sent second letter to Erdogan threatening sanctions over S-400s
Letter set out US conditions for resolving crisis over Russian-made missiles ahead of White House meeting, but Turkish president was not convinced, sources say
Erdogan’s bodyguards reportedly also attacked US Secret Service members in 2017 (video)
Court documents give new details about controversial May 2017 incident as Trump prepares to meet Erdogan in Washington this week
