Good question,,,,, The congressional democrats, the establishment Republicans and the fake news media, know they cannot impeach Trump,, so they want to de-legitimatize his presidency.
Make Trump look like a racist, dictator or uneducated buffoon so he becomes ineffective and cannot get any legislation passed.
Plus the mid terms are coming and the democrats want to gain control of the Senate, and they need a hate Trump media barrage to make it happen.
But I believe the opposite is going to happen.
Trump is succeeding the swamp is draining.
Leaving the Paris Accord is great for American workers, tax payers and the environment and bad for establishment politicians that just want our money.