Sanders hits Clinton adviser for saying she needs to 'shake some sense' into Iowans
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A spokesman for Democratic presidential candidate Bernie SandersBernard (Bernie) SandersThe media couldn't be more blatant in distorting Trump's words on Charlottesville Road to renewable energy is filled with potholes of ‘magic thinking’ Bernie Sanders: Trump’s Charlottesville comments ‘embarrassing’ MORE slammed an adviser to rival Hillary ClintonHillary Rodham ClintonAssange meets U.S. congressman, vows to prove Russia did not leak him documents High-ranking FBI official leaves Russia probe OPINION | Steve Bannon is Trump's indispensable man — don't sacrifice him to the critics MORE for saying she had delivered a speech meant to "shake some sense" into Iowans. 

Michael Briggs called the statement, which was attributed to a Clinton adviser by CNN, a "strange" way to gain support.

"This is a strange way to appeal to Iowans who already have a lot of common sense," Briggs said in a statement Thursday to CNN. 

"That's why they picked Barack ObamaBarack ObamaCongress needs to assert the war power against a dangerous president CNN's Don Lemon: Anyone supporting Trump ‘complicit' in racism DOJ warrant of Trump resistance site triggers alarm MORE in 2008 and that's why we are confident they will caucus for Bernie on February 1."

In the speech on Thursday, Clinton criticized the Vermont senator's policies and questioned many of his ideas, saying "theory isn't enough. A president has to deliver in reality," according to CNN. 

"Sen. Sanders doesn't talk much about foreign policy, but when he does, it raises concerns," Clinton said. "Sometimes it can sound like he really hasn't thought it through."