I suspect the “Blue Wave” will be bigger than reporting/polling is predicting for the following reasons:
1. The 2018 midterms are drawing interest from voters that usually stay on the sidelines and are not counted in polls since they tend to use people that voted in the past for most polling. Much like a section of Trump voters in 2016.
2. Young voters are more engaged and the Parkland students have helped to drive a national get out the vote message to young and first time voters through social media. Like those in #1, they are not called upon for most polling.
3. Early voting results reported only state political party. I suspect that a percentage of republicans (5-7%) are actually voting democratic.
4. Polling firms are being more conservative in their predictions due to the egg left on their faces from 2016.
Thoughts/comments?