"Regarding the Arpaio pardon, I would have preferred that the President honor the judicial process and let it take its course," said Sen. Jeff Flake (R-AZ), who has sparred repeatedly with the President in recent weeks.
Sen. John McCain (R-AZ) and a few other Republicans went further.
"The President has the authority to make this pardon, but doing so at this time undermines his claim for the respect of rule of law as Mr. Arpaio has shown no remorse for his actions," McCain said in a written statement.
"Last night's pardon announcement further divides our country as does the policy against transgender Americans defending our freedoms," said Rep. Carlos Curbelo (R-FL).
Democrats were outraged by the Arpaio pardon.
"The Arpaio pardon is basically a big middle finger to America. A loud, proud declaration that this Administration supports racism," said Sen. Chris Murphy (D-CT).
"Joe Arpaio does not deserve a pardon," said Rep. Raul Grijalva (D-AZ), who repeatedly jabbed at the President on Twitter. "Racist vigilantism has a champion in the White House."
There was a similar reaction to the release of a formal memo from President Trump, which bans transgender individuals from serving in the military, as top Republicans in the defense arena in Congress had almost nothing to say about the Friday night announcement.
"Military service is a privilege, not a right," said Rep. Vicky Hartzler (R-MO), one of the very few Republicans to even issue a statement about Mr. Trump's transgender ban announcement, which came soon after he left for a weekend at Camp David.
For Democrats - like with the Arpaio pardon - the reaction was much different.
"Transgender service members risk their lives to defend our nation, many with distinction," countered Rep. Paul Tonko (D-NY), one of many Democrats in Congress to denounce Mr. Trump's move. "These patriots deserve better."
"This is a disgraceful, bigoted attack on transgender Americans honorably serving our nation," said Sen. Jeff Merkley (D-OR).
"President Trump has again doubled down on the side of ignorance, bigotry, intolerance, and hate," said Sen. Sheldon Whitehouse (D-RI).
One other piece of news that broke on Friday night was the dismissal of controversial White House aide Sebastian Gorka, who was evidently pushed out the door by the new White House Chief of Staff.
"Sebastian Gorka did not resign, but I can confirm he no longer works at the White House," a White House official told the White House Pool reporter on Friday night.