By Noah Rayman
JOHN MCCAIN
Republican Senator
“I guess this means my spring break in Siberia is off,” McCain, an early proponent of sanctions against Russia, tweeted in response to the news that he faced retaliatory measures.
MARY LANDRIEU
Democratic Senator
The chair of the Energy Committee called for boosting U.S. energy exports to counter Russian influence. She has also criticized the ban on Americans’ adopting Russian children.
DAN PFEIFFER
Senior Obama adviser
The communications director for Barack Obama’s 2008 election campaign, he was one of the first White House officials to publicly raise the threat of sanctions.
–NOAH RAYMAN
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Write to Noah Rayman at noah.rayman@time.com