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 SandersBernie SandersSanders on women's march: Trump 'made a big mistake' Trump speaks with top Dem about high drug prices Sanders supports women marchers with tweet MORE slammed an adviser to rival Hillary ClintonHillary Rodham ClintonEx-Clinton aide calls Trump spokesman a 'failure' Madonna to critics of women's march: 'F--k you' Women's march takes over DC 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.

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"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 ObamaTrump inaugural TV ratings lower than Obama, Reagan: report Women's marches draw estimated 2.5M people across US Women's marches draw huge crowds as Trump takes office 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."