While I find it kind of hilarious how awful Trump's picks were, and I certainly don't support Sessions, I don't really expect Sessions' replacement to be anything more than a servile puppet.

So I have mixed feelings.

This would be funny if it backfires on Trump.  When Trump appointed Rod and Session he believed they would be his devoted puppets but they were not.  Just because Whitaker made some supporting statements doesn't mean once he is in command that he would be Trump devoted puppet.  Only time will tell once things get settled.

I swear, it seems like more people go in and out of the Trump Administration than a gas station off the freeway exit.

It's no secret that Trump wanted to fire sessions since he recuse himself.

Source

Who is Acting Attorney General Matthew Whitaker? The new Acting AG has the all the authorities of an Attorney General, Deputy AG Rosenstein no longer oversees the Russia probe, Mueller must report to the Acting AG. The Acting AG can refuse to indict anyone and can defund the investigation.

Deputy Attorney General Rod Rosenstein was not appointed to the role of Acting Attorney General and Special Counsel Mueller will report to the new Acting AG as he is not recused from the Russia investigation. Jeff Session's Chief of Staff Matthew Whitaker has been appointed by President Trump to be the Acting Attorney General,[1] to reiterate he is not recused from the Russia investigation, will be receiving a complete briefing about the investigation from Rosenstein and will most likely interfere the Russia probe. Whitaker is a Trump supporter who has defended the infamous Trump Tower meeting claiming any campaign would have accepted a meeting with a foreign adversary during an election,[2] has attempted to obfuscate Russian interference,[3] and has mused about defunding the Mueller investigation.[4] Acting Attorney General Matthew Whitaker wrote an opinion piece denouncing Special Counsel Mueller claiming the investigation was going too far.[5]

However, Special Counsel's purview includes any crimes discovered upon their investigation into Russia's interference.[6]

Context - Former Attorney General Jeff Sessions' Recusal from the Russia investigation and the Appointment of Special Counsel Mueller

Former Attorney General Jeff Sessions resigned at the request of the President and in an unusual move his Chief of Staff was appointed as Acting Attorney General.[7]

President Trump has repeatedly denigrated his former Attorney General for not doing enough to protect the President from the investigation and has gone as far as to ask Sessions to fire Mueller publicly.[8] However, former Attorney General Sessions was forced to recuse himself from the Russia investigation,[9] he met Russian Ambassador Kislyak during the 2016 campaign.[10] AG Sessions cited Title 28, Chapter 1, Section 45.2 of the Code of Federal Regulation, titled "Disqualification arising from personal or political relationship" as the reason as to why he recused himself from the Russia investigation.[11] Deputy AG Rod Rosenstein took over the Russia inquiry and subsequently appointed Special Counsel Mueller.[12] Deputy Attorney General Rod Rosenstein is a Republican, who appointed former FBI Director and Republican Robert Mueller as Special Counsel and was lauded by the Republican party,[13] Rosenstein was nominated by President Trump.[14]

Be respectful, cordial, do not give President Trump and his allies any excuse to label protesters as violent extremists. The nation and world will be watching, make your message loud and clear. Whitaker is not an impartial individual, he has repeatedly attacked the Mueller investigation and defended the Trump campaign's illegal actions. Acting Attorney General Matthew Whitaker must recuse himself from the Mueller investigation immediately and relinquish oversight to Deputy Attorney General Rod Rosenstein.

1. Wall Street Journal - Attorney General Jeff Sessions Resigns from Trump White House
2. CNBC - Trump's Acting Attorney General Matthew Whitaker, who has criticized the Mueller probe, will now oversee it
3. Newsweek - Who is Matthew Whitaker? If Trump fires Rosenstein, Jeff Sessions' Chief of Staff will take over
4. Washington Post - Trump’s new acting attorney general once mused about defunding Mueller
5. CNN - Mueller's investigation of Trump is going too far
6. Office of the Deputy Attorney General - Appointment of Special Counsel To Investigate Russian Interference With The 2016 Presidential Election and Related Matters
7. The Globe and Mail - U.S. Attorney-General Jeff Sessions resigns at Trump’s request
8. Twitter - Donald J. Trump, This is a terrible situation and Attorney General Jeff Sessions should stop this Rigged Witch Hunt right now, before it continues to stain our country any further. Bob Mueller is totally conflicted, and his 17 Angry Democrats that are doing his dirty work are a disgrace to USA!
9. Bloomberg - Mueller Investigated Sessions for Perjury on Russia Statements
10. Reuters - Mueller probing Russia contacts at Republican convention: sources
11. Cornell Law School - 28 CFR 45.2 - Disqualification arising from personal or political relationship.
12. U.S. Department of Justice - Appointment of Special Counsel
13. USA Today - Rare bipartisan moment: Both sides embrace Robert Mueller as special counsel
14. Reuters - Trump to nominate Rod Rosenstein to be deputy U.S. attorney general

Something happen that was very interesting on Fox and Friends. They asked a legal expert about the resignation/firing of Jeff Sessions and did not get the answer they were looking for. The legal expert Andrew Napolitano stated that legally Whiticare cannot become the acting AG because of these 3 conditions.

You have to already be the Deputy AG
If you have a job at the DOJ that requires you to be confirmed by the Senate
If you were appointed while the Senate was in recess

Whitaker does not meet any of those conditions so he cannot be the Acting AG. This is probably why the Dems are looking to do an emergency session on Whitaker appointment. If this legal expert is correct then it appears that Trump pulled the trigger to soon.

This should be interesting.  Since there is a lawsuit on Whitaker appointment, I guess we will see if this is constitutional or not.   When you really think about it, this is what happens when you piss everyone off.  Its not like we didn't see this happen during the Obama years so nothing really special.  If people believe there is even a hint that something goes against the constitutional then we will get countless lawsuits.

It's controversial because it's attached to something that is already a controversy.  Most politicians are careful not to make more waves around a controversial issue but Trump has never cared about that.  A referee in a football game makes a disputed call in the middle of the game that doesn't seem to have an effect on the score and no one really cares.  They make that same call on a play that determines who wins the game or not and it becomes a controversy.  Context and timing are the difference.

I like your answer better than mine and you are on point. 

On a funny note Trump did it again where he basically stated Whitaker appointment was due to the Russian probe.  You would think the man would have learned his lesson the last time which started this whole mess for him but stupidity knows no bounds for this man.

Just like before, when he stated that the Russian Probe was on his mind when he fired Comey, Trump basically admitted that he hired Whitaker because of his views on the Mueller.  Even if Whitaker was going to do exactly has the President wants, Trump just threw a bone to the Dems and anyone who wants Mueller to continue what he is doing.  This is not the first time Trump words have come up in court cases overturning directives he has done.  I wonder if this one will come back to bite him just like the others.