Sanders: I won't 'apologize' for national security stance
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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 is defending his record on national security as he comes under increasing fire from 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's campaign ahead of the Iowa caucuses. 

"I voted against the war in Iraq, Hillary Clinton voted for the war in Iraq," the Vermont senator told reporters Wednesday. "That may tell people about ... judgment. I'm not going to apologize to anybody about my judgement on foreign policy." 
Asked how he would respond to criticism from Clinton supporters that his foreign policy is "dangerous," Sanders doubled down on his criticism of Clinton's Iraq War vote, calling the military conflict "the major foreign policy issue in the modern history of this country." 
The comments come after top officials for the former secretary of State's campaign stepped up their criticism of Sanders, suggesting he was inexperienced on foreign policy. 
Ten former officials, who are also supporting Clinton, also said earlier this month that they are "concerned that Sanders has not thought through these crucial national security issues that can have profound consequences for our security."
But Sen. Dick Durbin (D-Ill.), who is supporting Clinton, came to Sanders's aid on foreign policy Wednesday, saying he didn't have any concerns about his ability to be commander-in-chief. 
The latest rhetorical scuffle between the two Democratic candidates comes as they are locked in a neck-and-neck battle for the top spot in Iowa with just days left to go before the caucuses.