Quote (ThatAlex @ 17 Jun 2018 21:52)
The immigration camps are the flavor of the month. We can't say for certain it's going to be their #1 issue going into the 2018 midterms. If it does become their primary issue, I think it's a bad choice for the same factors you and Black XistenZ mentioned. There's too much overlap with Obama-era immigration policies and many Americans favor tougher immigration laws, anyways.
They don't have a #1 issue yet. Their messaging is scattered and all over the place. One of the only things the party can unite behind is anti-Trump sentiment, but that strategy is also decreasing in efficacy due to the strong economy, Trump's rising approval ratings, and general Trump fatigue.
Democrats are in a tough spot. They own Obamacare, the economy is doing good, and immigration is probably not a good choice. They also are lacking party leadership. Voters are split on figures like Chuck Schumer, Nancy Pelosi, and Bernie Sanders.
One thing they have going for them is independents. Trump is very favorable with Republicans but only has a 35% approval rating with independent voters. So a center-left platform would probably serve them best, but they also have party leaders like Elizabeth Warren pulling them left.
The party doesn't know who it is or who it should be. They are still reeling from 2016 and haven't recovered.
They are simply torn between those who want the party to move to the right (and support Conor Lamb Doug Jones types of candidates), and those who want to turn to the left (Warren, Harris, Gillibrand). I have a hard time seeing a compromise for this conflict.