The Hill: Sanders uses Senate account to take subtle shot at Clinton

Lawrence Noble, general counsel of the Campaign Legal Center, told The Hill that the tweet's "content [is] clearly at that line of what is campaign content."
"That is getting very close to the line on what is campaign oriented, especially in the context of what was said at the debate," he said, noting that it's unclear whether either the Federal Election Commission or the Senate would find this worthy of further scrutiny.  
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