Reid made the comments in remarks that reopened the Senate after a week-long break.
He urged GOP senators to consider how their decision affects U.S. national security and that further delay "sent a dangerous message to Russian leaders."
"Since a few Republicans blocked these important sanctions last work period, Russian lawmakers voted to annex Crimea and Russian forces have taken over Ukrainian military bases," Reid said.
"It's impossible to know whether events would have unfolded differently if the United States had responded to Russian aggression with a strong, unified voice."
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http://www.washingtonpost.com/blogs/post-politics/wp/2014/03/24/harry-reid-accuses-gop-of-helping-russia-annex-crimea-as-ukraine-aid-deal-clears-procedural-hurdle/