A little update on the battle for the Senate. The balance of power is currently 51-49 Republican, so the Democrats need to net two seats to take the chamber -2 seats from taking the chamber thanks to Pence as a tie-braker. There are two Republican seats where polls show them ahead by a little. Let's just give those to them.
Nevada -> D
Arizona -> D
New balance: 49-51 Democrats hold the chamber by a single race.
Unfortunately, North Dakota looks like it's not going to be close and will give Republicans one of those seats right back.
North Dakota -> R
New balance 50-50 with Republicans maintaining the chamber by tie-breaker.
That means that Democrats are going to have to find at least one more seat. There are currently only two other marginally competitive Republican seats. Tennessee where Marsha Blackburn trailed at the start, but is now leading and Texas where it's merely closer than expected, but Cruz has never trailed in a major poll.
Tennessee -> D
Still, let's say the blue wave happens and one of those races goes to the Democrats.
New balance: 49-51 Democrats.
That alone would take a bit of luck. But that's not all. Republicans are competitive in several other states. So Democrats would have the run the table in the following states (all of which Trump won).
Gonna be a tall order.