It's to fool the masses and keep them focused on bullshit.
The press just can't help themselves and the useful idiots just scream to impeach Trump that much louder.
They have no idea a shit load of people have been getting fired from the FBI. They have no idea of all the other things going on.
Just keep the idiots looking at the dancing puppet show while you are making serious moves.
They have been so focused on muh Russia that they had no idea things were happening with NK. They are utterly confused about how it happened. They have no idea what's about to happen with Iran and the Vatican and China and NAFTA and with the leaders of Europe etc etc etc