The battle between Bernie Sanders and Elizabeth Warren for the Democratic left is ratcheting up.Unlike in 2016, when Sanders didn’t have to sweat his left flank, Warren has managed to steal the spotlight from him on several issues.

At times, she’s simply been the first to roll out a detailed policy proposal on an issue she and Sanders agree on. At others, she’s gone where Sanders has been unwilling to, like proposing to eliminate the filibuster and Electoral College.

The two politicians, who consider themselves friends, aren’t aggressively attacking each other. But Warren’s plays have gained notice — and could portend a bigger fight.

The massive student loan cancellation plan Warren rolled out is the most high-profile example. When Sanders was asked to respond to it at a CNN town hall last week, he was noncommittal. “I really haven’t studied it.

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