The biggest issue facing Democrats as they head toward the 2018 midterm elections and their quest to retake both the House of Representatives and the Senate is to identify what Democrats are for and not just against. The search is for a rallying issue, so to speak.
The difficulty is that it is sometimes a bit challenging to distinguish the two especially when dealing with such a destructive force as the CONmander-in-Chief.
There are a couple of good places to start, however. First, simply look at all of the Obama Administration actions that have been, item by item, undone by the current administration. Re-entering the Paris Climate Accord since we are the only nation, and I said only nation thanks to Trump, who is not a signatory is one easy issue to adopt for Democrats. Climate change, by the way, is real, and not being part of the solution implies we are part of the problem. Current efforts to roll back automobile emission standards are a prime example.
Rescinding President Obama's executive order on DACA, Deferred Actions on Childhood Arrivals, only served to create an unnecessary crisis. How this issue will ultimately be addressed remains to be seen, but it is likely that it will leave casualties no matter how it is addressed, if at all.