I think its more who comes out. In 2006, a lot of young people were very interested in the election because they were not happy with Bush and the war. In 2010 and 2014, the young people really didn't come out like they did in 2008 or 2012... so I think in 2018, you're going to see young people come out, especially millennial women... African Americans I think will come out in larger numbers....
The only thing in American politics that seems to be our legacy is that elections are cyclical, alternating back and forth between Democrats and Republicans. Even in 1938, the New Deal Democrats saw huge losses... the Republicans have held onto the House since 2011. In a country that is deeply divided... and based on history, one might look back and say that their chances of even holding onto the House are not very good.
I agree. Almost all millenials will be eligible to vote in 2018, and they will all have that privilege in 2020.