Rex Tillerson
U.S. President Donald Trump just fired Secretary of State Rex Tillerson:
Donald J. Trump @realDonaldTrump - 12:44 PM - 13 Mar 2018
Mike Pompeo, Director of the CIA, will become our new Secretary of State. He will do a fantastic job! Thank you to Rex Tillerson for his service! Gina Haspel will become the new Director of the CIA, and the first woman so chosen. Congratulations to all!
According to the anti Russian propagandists (vid) Tillerson got the job because Trump loves Russia and Tillerson was in good standing with Putin. The same people now claim that Tillerson was fired from his job because Trump loves Russia and Tillerson was not in good standing with Putin.

Neither is correct. The plan to oust Tillerson and elevate Pompeo to State has been rumored and written about for several months. The plan was "developed by John F. Kelly, the White House chief of staff". It had nothing to do with Russia.

Tillerson never got traction as Secretary of State. Congress disliked him for cutting down some State Department programs. Trump overruled him publicly several times.

There is some contradiction in the statements coming from the White House and the State Department. According to the Washington Post:
Trump last Friday asked Tillerson to step aside, and the embattled top diplomat cut short his trip to Africa on Monday to return to Washington.
Last Friday Tillerson suddenly fell ill while traveling in Africa and canceled several scheduled events.

But a statement by Undersecretary of State Steve Goldstein contradicts the Friday claim:
"The Secretary had every intention of staying, because of critical progress made in national security. [...] The Secretary did not speak to the president and is unaware of the reason."
Tillerson knew he was fired but did not tell his staff?

[UPDATE:]
From the Associated Press White House correspondent:
Zeke Miller @ZekeJMiller - 3:49 PM - 13 Mar 2018
WH official says chief of staff John Kelly called Tillerson Friday and again on Saturday. Both calls to Tillerson, the official says, warned that Trump was about to take imminent action if he did not step aside. When Tillerson didn't act, Trump fired him.
And shortly thereafter:
NBC Politics @NBCPolitics - 4:22 PM - 13 Mar 2018
JUST IN: Under Secretary of State Steve Goldstein is being fired for contradicting the account of Rex Tillerson's dismissal, White House official tells @PeterAlexander
Thus ends the 2018 insurrection at State.

[End-Update]

With Tillerson leaving Secretary of Defense Mattis is losing an ally in the cabinet:
[I]t starts with me having breakfast every week with Secretary of State Tillerson. And we talk two, three times a day, sometimes. We settle all of our issues between he and I, and then we walk together into the White House meetings. That way, State and Defense are together.
Mattis sometimes calming influence over Trump on military issues will now become less effective.

CIA head Pompeo, the new Secretary of State, is a neoconservative with a racist anti-Muslim attitude and a special hate for Iran which he compared to ISIS. That he will now become Secretary of State is a bad sign for the nuclear agreement with Iran. The Europeans especially should take note of that and should stop to look for a compromise with Trump on the issue. The deal is now dead. There is no chance that a compromise will happen.

The new CIA director Gina Haspel is well known for actively directing and participating in the torture of prisoners at 'black sites':
Beyond all that, she played a vital role in the destruction of interrogation videotapes that showed the torture of detainees both at the black site she ran and other secret agency locations. The concealment of those interrogation tapes, which violated multiple court orders as well as the demands of the 9/11 commission and the advice of White House lawyers, was condemned as "obstruction" by commission chairs Lee Hamilton and Thomas Keane.
Haspel would be in jail if former president Barack Obama had not decided against prosecuting the CIA torture crimes. Torturing prisoners is a war crime. Obstruction of courts and destruction of evidence are likewise crimes.

Both, Pompeo and Haspel, will need to be confirmed by Congress. Both will receive a significant number of 'yes'-votes from the Democratic side of the aisle.