MSNBC host Joe Scarborough on Saturday warned Republicans against President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE firing special counsel Robert Mueller, saying it would destroy their majorities for years to come.

The "Morning Joe" host and former Florida GOP congressman noted that some have suggested firing Mueller in recent days, while Republicans also suffered a defeat when the party lost a Senate seat in Alabama after a special election this week.

"Republicans pushed Americans too far in Alabama. They lost the most conservative state in America. Three days later they suggest the firing of Bob Mueller. That would start a constitutional crisis that will destroy GOP majorities for years. How stupid," Scarborough tweeted.

Republicans pushed Americans too far in Alabama. They lost the most conservative state in America. Three days later they suggest the firing of Bob Mueller. That would start a constitutional crisis that will destroy GOP majorities for years. How stupid. — Joe Scarborough (@JoeNBC) December 16, 2017

His comments came after Republicans this week tore into Mueller's probe of alleged ties between the Trump campaign and Russia after text messages between two FBI officials sent during the 2016 campaign surfaced, appearing to show an anti-Trump bias.

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Peter Strzok, an FBI official who was dismissed from Mueller's team earlier this year, had said Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.) was "an idiot like Trump," while FBI lawyer Lisa Page called Trump "a loathsome human."

"God, Hillary should win 100,000,000-0," Strzok said in another message to Page.

Republicans have pounced on the text messages, saying they show anti-Trump bias in the Mueller probe.

Strzok and Page were reportedly engaged in an extramarital affair at the time the text messages were sent in a private capacity.

There is nothing in the FBI guidelines that prevents agents from having or expressing a political opinion in a personal capacity.