Michael Flynn announced that he canceled a campaign appearance due to an unspecified family emergency

The event was for Republican US Senate candidate Troy Downing

He is currently challenging Democratic US Senator Jon Tester

Tester enraged the president by derailing the nomination of Ronny Jackson to head the Department of veterans Affairs

Trump revealed cryptically that he knows a secret of Tester's that would destroy his support

http://www.dailymail.co.uk/news/article-5697481/Michael-Flynn-cancels-Montana-campaign-appearance-unspecified-family-emergency.html#ixzz5ElUeSUPF