The conservative network is facing competition from its liberal competitors and it the attack at Capitol Hill has contributed to the ratings win.
Democratic Congressman Adam Schiff called for a quick impeachment of the president, following the riot at the Capitol on Wednesday.
Carlson is losing the 25-54 audience to CNN, but is still the most-watched primetime cable news show.
"At one point, we really thought there was a possibility that it might kill her, and that's why I've been away," Maddow said Thursday night.
"Schadenfreude," which translates to "enjoyment obtained from the troubles of others," was used frequently on Friday.
Senator Elizabeth Warren said Republicans want to "tilt" the U.S. Supreme Court "so that it doesn't reflect the values of the majority of Americans."
"Journalists make a big deal about looking at stories from all sides, but they don't," Logan said. "There's been how many conversations about the bias at Fox? But we don't talk about the liberal bias. Why can't we have that conversation, as well?"
She reacted to a few rare words of praise from the president on Friday, pointing out several ways he's personally leading "the worst national response of any industrialized nation in the world."
"We are responsible for the people who claim to be our supporters and do really threatening, ugly, dangerous things to other candidates," Senator Elizabeth Warren told Rachel Maddow on Thursday.
Senator Bernie Sanders said that a Democratic convention rules change means that he will drop out of the race if former Vice President Joe Biden ends up with a plurality of pledged delegates, adding that superdelegates deciding the nomination would be a "real disaster" for Democrats.
Ahead of Tuesday's primaries, the MSNBC host stopped by 'The Tonight Show' to make sure that Fallon was all caught up on the Democratic primary.
"This is not a warning. The dark days are not coming. The dark days are here," Maddow told viewers Friday.
Reince Priebus accused MSNBC host Rachel Maddow of being involved in a conspiracy, after she interviewed Lev Parnas on Thursday.
Lev Parnas told MSNBC'S Rachel Maddow Thursday that President Donald Trump attempted to fire then-Ambassador to Ukraine Marie Yovanovitch multiple times, but it didn't work. "It was becoming comical," Parnas said.
The show's previous record was 4.13 million viewers in March 2017.
In the second installment of his interview with MSNBC's Rachel Maddow, Lev Parnas compared President Donald Trump to a "cult leader," saying "There's a lot of Republicans that would go against [Trump]."
Lev Parnas told Rachel Maddow that the only reason former U.S. ambassador Marie Yovanovitch was removed from office was that she stood in the way of the Biden investigation. Parnas also said that Robert Hyde, suspected of keeping tabs on Yovanovitch's location, was "drunk all the time."
On 'The Rachel Maddow Show' Wednesday, Lev Parnas said that Vice President Mike Pence was given the assignment to have Ukraine investigate Joe and Hunter Biden.
New Jersey Senator Cory Booker told Rachel Maddow he suspended his 2020 presidential campaign because of low campaign funds and his missing the last debate, a situation he called a "perfect storm."
A reporter for The Washington Post said in an opinion article on Thursday that MSNBC host Rachel Maddow "rooted" for the now mostly-debunked Steele dossier to be true during her coverage of Donald Trump's alleged collusion with Russia during the 2016 presidential election.
In her first television interview since reappearing in public life, former FBI lawyer Lisa Page said that after President Trump "did that vile sort of simulated sex act" at a Minneapolis rally, "being quiet isn't making this go away."
"What they just announced today in terms of changes to asylum law though," Maddow said, is "maybe this president's most radical effort to change laws along racial lines since the Muslim ban."
Some conservatives criticized the MSNBC announcement, while others hoped more members of the "ideological media" would moderate debates in the future.
"The news today sounds a lot like high school—gossip, bickering, backstabbing—and that's just from today's White House briefing, sis."
The former secretary of state warned Rachel Maddow that the president will plunge the White House into deeper chaos after the midterm elections.
The former acting attorney general took aim at the president over his Helsinki meeting with Putin.
Maddow broke down in tears live on air on Tuesday night while reporting on babies and toddler shelters on the southern U.S. border.