Very Bad Indicator For Democrats

Democrats say they're voting by mail in much larger percentatges than the GOP, but one political intelligence firm things the two parties are close to neck and neck. Assuming intentions are accurate, this points to a big Republican win next week. I haven't seen a data point other than this, that makes me think a GOP sweep of Congress is possible. A turnout advantage makes it possible though. Not putting too much weight on this, but it is part of an overall picture that shows the gap closing and races tightening into tossups.