Blinken and members of the U.S. Congress said in a series of television interviews that the turmoil in Russia has weakened Putin in ways that could aid Ukraine's counteroffensive against Russian forces within its territory while benefiting Russia's neighbors, including Poland and the Baltic states.
"I don't think we've seen the final act," Blinken said on ABC's "This Week" program after an aborted mutiny by forces led by Yevgeny Prigozhin.
Blinken said tensions that sparked the action had been growing for months and added that the threat of internal turmoil could affect Moscow's military capabilities in Ukraine.
"We've seen more cracks emerge in the Russian facade. It is too soon to tell exactly where they go, and when they get there. But certainly, we have all sorts of new questions that Putin is going to have to address in the weeks and months ahead," Blinken told NBC's "Meet the Press" program.
Blinken described the turmoil as an "internal matter" for Putin.
"Our focus is resolutely and relentlessly on Ukraine, making sure that it has what it needs to defend itself and to take back territory that Russia seized," Blinken said.
U.S. officials expect to learn more in coming days and weeks about the events that unfolded in Russia, including details of the deal with Prigozhin mediated by Belarusian President Alexander Lukashenko that led Wagner fighters to return to their bases.
"It may be that Putin didn't want to debase himself to the level of negotiating directly with Prigozhin," Blinken said.
'DISTRACTED AND DIVIDED'
Forces led by Prigozhin, a former Putin ally and ex-convict, have fought the bloodiest of battles in Russia's 16-month war in Ukraine.
"To the extent that the Russians are distracted and divided it may make their prosecution of aggression against Ukraine more difficult," Blinken told ABC.
House of Representatives Intelligence Committee Chairman Mike Turner said Putin's future actions in Ukraine could be inhibited by Prigozhin's assertion that the rationale for invading Ukraine was based on lies concocted by the Russian top brass.
"Taking down the very premise makes it much more difficult for Putin to continue to turn to the Russian people and say, we should continue to send people to die," Turner told CBS' "Face the Nation" program.
U.S. Senator Ben Cardin said the weekend turmoil in Russia does not ease Washington's need to continue aiding Ukraine as it launches its long-awaited counteroffensive against Russia.
"This is a critical time for Ukraine. This counteroffensive is going to be defining as to where we're going to be in the next year or two," Cardin, a Democrat who sits on the Senate Foreign Relations Committee, told Fox News.
"So, it's incredibly important that we maintain our support and not be fooled by what's happening in Russia today as to the needs of the Ukrainians."
Republican Representative Don Bacon, a former U.S. Air Force general who sits on the House Armed Services Committee, told NBC that the weekend turmoil could leave Russia weaker for years, calling it a benefit to neighboring countries including Finland, Estonia, Latvia, Lithuania and Poland.
"It would be different if Putin was wanting to be a peaceful neighbor. But he's not," Bacon said.
Blinken said neither the U.S. nor Russian nuclear posture had changed as a result of the crisis. But he said U.S. officials are monitoring Russia's nuclear status "very, very carefully."
