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) SandersChris Murphy’s profile rises with gun tragedies Clip shows Larry David and Bernie Sanders reacting after discovering they're related For now, Trump dossier creates more questions than answers MORE slammed an adviser to rival Hillary ClintonHillary Diane Rodham ClintonChris Murphy’s profile rises with gun tragedies DNC, RNC step up cyber protections Gun proposal picks up GOP support 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 Hussein ObamaAll five living former presidents to attend hurricane relief concert Overnight Health Care: Schumer calls for tying ObamaCare fix to children's health insurance | Puerto Rico's water woes worsen | Dems plead for nursing home residents' right to sue Interior moves to delay Obama’s methane leak rule 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."