Lemmon said he couldn't understand Republicans' continued support for President Donald Trump.
The Fox News host later praised Trump for backtracking on his comments.
President Donald Trump and Hillary Clinton have continued to attack each other long after the 2016 election.
The judge did not rule on the merits of the case and it was not brought by the DNC, as Trump claimed.
"How sick, how sick for someone in the White House to tweet "thank you" to Donald Trump for these reunions," Brzezinski said on 'Morning Joe."
The approval was given by the office of London Mayor Sadiq Khan, a longtime critic of the U.S. president.
The official, taxpayer-funded White House Twitter account is now attacking the president's political opponents.
Michelle Wolf gained headlines earlier this year for her attack on Sarah Huckabee Sanders,
Tom Arnold had been working to track down damaging tapes featuring President Donald Trump.
It is not the first time a lack of diversity surrounding President Donald Trump has been noted.
Opposition has been growing to the Trump administration's policy of separating families at the border.
Criticism of the Trump administration policy separating families at the border is growing, and across the political spectrum.
Unlike Ivanka Trump, Chelsea Clinton has said she would never hold an official position in her parents' administration