Do Democrats have to be more than "not-Trump"?

Just before the 2010 midterms, then-Senate Minority Leader Mitch McConnell famously/infamously told National Journal this: “The single most important thing we want to achieve is for President Obama to be a one-term president.”

Republicans only loosely outlined an agenda of what they would do if given control — and it largely revolved around undoing what Obama had done. Heck, Donald Trump ran and won, primarily, on the idea that he would simply get rid of all the things that Obama did that Republicans (and independents) didn’t like.

The question for Democrats is whether they should follow the example of their Republican counterparts or, like Klobuchar, put a positive message front and center — and avoid making the 2018 and 2020 elections solely about Trump.