"I just think it’s another day in the life of Washington, D.C., these days," Sen. Marco Rubio (R-Fla.) said.
Dobbs jumped fully into battle for Trump as he insisted Republicans apologize to the president.
The "Last Week Tonight" host called out the president for asking foreign powers to investigate his political rivals.
"Rubio, thy name is cowardice," George Takei responds on Twitter.
The Senate majority leader is facing new pressure to act on stalled election security bills.
"So says he who is ensnared by his hotheaded and wrathful friends at the NRA and in the Oval Office," one Twitter user replied.
Sen. Marco Rubio and AIPAC said they support Reps. Ilhan Omar and Rashida Tlaib's entry into Israel after officials in the country said they weren't allowed.
"Are you trying to tell us something?" asked one person on Twitter.
"Rubio, far from the Republicans’ savior, seems just another slick politician with his finger in the wind — pushing the party deeper into Trump’s swamp."
The senator said people had gone "crazy with their outrage" after Donald Trump attacked four progressive congresswomen.
Classified briefings on Iran will also be given next week to the full House and Senate.
In a video posted earlier on Twitter, Guaido said he had begun the “final phase” of his campaign to topple Maduro.
He and Marco Rubio laid out the latest GOP effort to attract women with a plan that undercuts Social Security.
Attorney General William Barr may release key findings of the special counsel's report to Congress on Sunday.
The Republican senator's comments on Venezuela's power outages came back to bite him on Saturday.
Rand Paul, John Cornyn, Susan Collins and other Republicans have also raised concerns about the plan.
"You could wind up in sort of a theatric victory at the front end and then not get it done," Rubio said.
Some Republicans refuse to let go of tough-on-crime politics.