Rubio and Daines for sharing images of Zelensky from a Saturday meeting.
Lawmakers were asked to refrain from revealing visual details from their talk with the Ukrainian president.
Zelensky remains in a difficult position as he continues to rally his country against Russian forces.
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Marco Rubio of Florida and Steve Daines of Montana on Saturday were criticized for sharing images of Ukrainian President Volodymyr Zelensky on social media after being asked not to do so during a meeting in the interest of the leader's safety.
Several aides who spoke with NBC News said lawmakers were specifically asked not to tweet about the meeting.
Rubio posted a screenshot on Twitter of Zelensky: "On zoom call now with President Zelensky of #Ukraine.". »