What is your prediction on the outcome of the 2018 Congressional elections? Will Democrats take-over one or both Houses of Congress?

What is your prediction on the outcome of the 2018 Congressional elections? Will Democrats take-over one or both Houses of Congress? What type of future events might make it more likely for Democrats to take over and what types of future events might make it more likely for Republicans to win?
Who do you think will win the race for the Texas Senate between incumbent Senator Republican Senator Ted Cruz and Democrat Beto O’Rourke? How do you favor? (you may select a third party candidate). Why?