Talk about a Twitter war.

A group supporting Hillary Clinton says it will spend more than $1 million to “push back” against attacks made against the Democratic presidential front-runner and her supporters on Twitter, Facebook and other platforms.

Correct the Record, a super PAC dedicated to defending Clinton from “baseless attacks,” said it is pouring the money into the so-called Barrier Breakers 2016 digital task force. The group said it will more than triple its digital operation “to engage in online messaging both for Secretary Clinton and to push back against attackers on social media platforms like Twitter, Facebook, Reddit and Instagram.”

The super PAC says it’s applying lessons learned from interacting online with “Bernie Bros” — supporters of Clinton’s primary opponent Bernie Sanders — to the rest of the primary season and the general election.

The Sanders campaign did not immediately reply to a request for comment.

Clinton leads Sanders, a Vermont senator, in the delegate count and is in a strong position to capture the nomination. The two compete next on Tuesday in five states. Recent polls show Clinton ahead of Sanders in Connecticut, Delaware, Maryland, and Pennsylvania. RealClearPolitics shows the latest poll for Rhode Island, the fifth state, was in February. Clinton led at the time.

Correct the Record said superdelegates supporting Clinton have been attacked online. These are the party insiders and others who may support any candidate they choose in a state’s nominating contest. The Sanders campaign has said as recently as Tuesday that it will work to flip superdelegates to the senator’s side.

Read: Here are the ‘superdelegates’ that stack the Democratic race toward Clinton.

Including superdelegates, Clinton has 1,930 of the 2,383 delegates required to clinch the nomination. Sanders has 1,189. See delegate tracker.