2018

Even if we look at the midterms in a practical sense, it's going to be very very hard for the Democrats to make much headway (if any).

In the Senate, which is by far the most important there are 33 senators up for re-election in 2018 and of those 33 there are 23 Democrats and 2 Democrat caucusing independents.  So effectively 25 Democrats and 8 Republicans.
As it stands today there are only two Republican seats that are considered toss ups and three Democrat seats that are considered toss ups.

There are then 11 more Democrat seats that aren't considered "safe", which means they're competitive.

Then you take a step back and look at fundraising in general.  The DNC has had a terrible fundraising year and I believe it was either October or November that was just recently reported as the worst fundraising month they've ever had.  Meanwhile the RNC is breaking records.
If there truly is a "blue wave" incoming then it better start building soon. 

The DNC candidates have nothing to campaign on other than "Trumps bad", but unfortunately more and more Americans are realizing (as Rog mentioned) that Trump aint so bad after all.

As always, time will tell but things are really looking good for conservatives in the US IMHO.

Man, if the only thing the Dems have is "Trump is the devil", it's not going to play well when the DOW goes over 27,000 and the S & P hits 2800, while the economy grows at 4-6%.  If those things happen, and it's looking better for them every day, all the whining in the world won't save a party that has no platform.

You do realize all those things are because of Obama right.  ;-)

The commentaries on CNN are the funniest.  It's all doom and gloom coming now. LMAO 

Runaway inflation, high interest rates, a market bubble crash........it's all over.