my dude Michael Brooks (seriously, watch his show) had Kyle Kulinski from Secular Talk (who I feel goes into that "progressive (with quotes)" box of which you speak) and they just kind of talked it out.

really good points made. Brooks (who understands history as it relates to politics) made sure to note that to build a coalition, you need to be serious about certain things to get the groups to come together.

you don't even have to go to 2016. look at 2008.

Barack Obama got the "DMX" response until Iowa caucus happened. a few more wins and people were convinced that he would have their back in certain ways, he rode that wave to the Presidency.

(now whether Obama held up his side of the deal is a different discussion altogether...)

https://www.youtube.com/watch?v=JV5o2aPgiC8