CNN:

The United States believes Russian President Vladimir Putin may be willing to take more aggressive action against the US, including dialing up his attempts to interfere with American elections in response to its support for Ukraine, according to four sources familiar with recent US intelligence assessments.

That could include direct attacks on US election infrastructure, among a broad range of options, the sources said.There is no evidence that Putin has made a decision to interfere in upcoming elections or that he has preferred candidates, the sources said.

Attempted hacks on voting infrastructure would also not be easy, because voting systems in the US are so diffuse and decentralized.

But whereas previously Putin was less willing to try to directly interfere in states’ voting systems — opting instead to order scans of voter registration databases and conduct influence campaigns to sow doubt in the legitimacy of elections — intelligence officials believe Putin may now be willing to go further than in previous interference efforts.