"They have consistently pursued a strategy aimed at gridlock to make Americans see the dysfunction and then blame it on the party in power and run against them," he continued. "It's the most cynical, craven, and dangerous policy that I've ever seen in the 27 years that I've been here in the Senate. And I regret it for our country."

In recent days, Senate Republicans used procedural tactics to force the Democratic-controlled chamber to cancel its Independence Day recess and drop a bill co-authored by Kerry that would have authorized military action in Libya.

Republicans twisted the arms of Democratic leadership into taking up legislation that deals with reducing the deficit instead. 

In his speech Wednesday, Kerry said Republicans' complaints about the Senate's inaction on budget issues amount to "crocodile tears."