Kasowitz has been a Trump personal lawyer for years and knows absolutely nothing about any of the legal issues coming out of the Comey hearings.
The New York Times warned about Kasowitz' telling WH staff they don't have to lawyer up. The Times points out that if WH personnel hire lawyers then Kasowitz can not talk to that staffer without his or her lawyer being present. And Kasowitz does not represent the White House or the presidency. He only represents Donald J. Trump.
Actually staff exposes themselves if they talk to him.
Interestingly he represents the SVB Bank,the Russian entity favored by Vladimir Putin.