"Morning Joe" co-host Mika Brzezinski Mika Emilie BrzezinskiMika Brzezinski: 'Super grossed out' by Trump speech attendees 'who put their lives at risk' Trump hurls insults at Harris, Ocasio-Cortez and other women Trump targets 'Complete psycho' Scarborough, 'ditzy airhead' Brzezinski while praising 'Fox & Friends' MORE spoke out about the abrupt retirement of her long-time MSNBC colleague Chris Matthews this week.

"I'm sad; Chris's passion and joy was infectious ... and it was backed up by a political gut that was unmatched in our world," Brzezinski said on her show Tuesday morning.

"As a woman, I loved working with Chris Matthews; I really enjoyed being his colleague," she added.

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Continuing, Brzezinski said that she realized the importance of "cancel culture," saying that the changes caused by the movement were "painful" but "necessary."

"I remain his friend," she said.

This: Chris Matthews' retirement: Chris Matthews is a giant, and he will be missed https://t.co/JSMrIRjwL5 — Mika Brzezinski (@morningmika) March 3, 2020

Matthews, who had been the host of "Hardball" on the network for 20 years, announced at the beginning of his show Monday that it would be his last show.

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"I’m retiring. This is the last 'Hardball' on MSNBC, and obviously this isn't for lack of interest in politics," the 74-year-old said. "As you can tell, I've loved every minute of my 20 years as host of 'Hardball.' Every morning, I read the papers and I'm gung-ho to get to work. Not many people have had this privilege."

Over the past month, Matthews received significant flak for likening Sen. Bernie Sanders Bernie SandersSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Schumer, Sanders call for Senate panel to address election security MORE’s (I-Vt.) decisive win in the Nevada caucuses to the Nazi invasion of France in 1940, drawing immense criticism from those who noted Sanders is Jewish and many of his family members were killed in the Holocaust.

never thought part of my job would be pleading with a national news network to stop likening the campaign of a jewish presidential candidate whose family was wiped out by the nazis to the third reich.



but here we are. https://t.co/2G1bqZ6bkI — mike casca (@cascamike) February 22, 2020

He also received criticism for an interview with Sen. Elizabeth Warren Elizabeth WarrenNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts It's time for newspapers to stop endorsing presidential candidates MORE (D-Mass.), in which he dismissed what she had said about former New York City Mayor Mike Bloomberg's record of using non-disclosure agreements.

The interview with Warren prompted GQ columnist Laura Bassett to resurface allegations of "inappropriate" behavior against Matthews.

In 2017, I wrote about a cable news host being gross and inappropriate with me. I was afraid to name him at the time. I'm not anymore; it was Chris Matthews! And his sexist exchange with Warren this week inspired me to revisit those moments and name him https://t.co/oBWXXJDPhR — Laura Bassett (@LEBassett) February 28, 2020

"In 2016, right before I had to go on his show and talk about sexual-assault allegations against Donald Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE, Matthews looked over at me in the makeup chair next to him and said, 'Why haven’t I fallen in love with you yet,'" Bassett wrote in a GQ piece that was published Friday.

"When I laughed nervously and said nothing, he followed up to the makeup artist. 'Keep putting makeup on her, I’ll fall in love with her.'"

Matthews also made headlines last week when he confused South Carolina Democratic senate candidate Jaime Harrison with Sen. Tim Scott (R-S.C.), both of whom are black.