I think you are correct about Ryan. His days are numbered.
https://www.cnbc.com/2018/04/10/trumps-top-homeland-security-advisor-tom-bossert-to-resign.html
Trump’s top homeland security advisor Tom Bossert resigns a day after John Bolton starts as national security advisor
President Donald Trump’s homeland security advisor, Tom Bossert, resigned.
The White House didn’t give a reason for the resignation.
It appears that new national security advisor John Bolton is looking to put his own stamp on White House personnel.
...to clean House. Capitalization of H makes me think Ryan is in trouble.
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Concur, but I think it’s more than Ryan. My 1st reaction was cleansing of the entire HOUSE.