The character of Donald Trump will be a subject of biographies for years to come. It will not be his economic and social policies that will be highlighted. Never have we had a president like him who takes revenge on those who do not bow down to him personally by repurposing presidential powers to punish them. His targets have been members of his own political party or any establishment within his own government that challenges him, those who put loyalty to the rule of law over loyalty to him, and especially the media.
UPDATE August 24, 2018: Many of the federal actions of tax fraud and money laundering have been farmed out to other federal districts, such as the Southern District of New York, which means firing Mueller would not stop those actions. Only the Manafort case remains in the Mueller hands. Firing Jeff Sessions and replacing him with a Trump loyalist that would be able to destroy the Mueller probe would have happened August 23 as Sessions reaffirmed his support of the integrity of his Department of Justice on his way to meeting Trump, basically revolting against Trump's attacks against him and a deep state. Sessions is still there much to the support of his fellow GOP Senators, which he once also was but the conflict may be epic. Expect that firing to take place after November because before then, it would be viewed as an obstruction of justice. In the meantime, the guilty plea of Trump's lawyer .Michael Cohen, has opened a can of worms...implicating Trump's direction in the illegal method used to pay hush money to Trump's liaisons that would have come to light a few weeks before the November 16 election. Worse for Trump is that the Cohen documents filed in court contained information that now has sparked New York state and local District Attorney in Manhattan have begun probes into the Trump organization and Trump Foundations which would put the Trump kids in legal jeopardy. Trump pardon offers do not work