Nate Cohn for NYT’s The UpShot:

Democrats could be forgiven for dreaming about a “blue” Florida. It is diversifying as fast as Texas or Arizona, and the demographic composition of its electorate may be poised to shift even faster than anticipated.

As many as 300,000 people have fled to Florida from Puerto Rico in the aftermath of Hurricane Maria. And a ballot initiative this November could return the vote to the state’s estimated 1.5 million discharged felons. At first glance, either tally of these two Democratic-leaning groups would seem to dwarf Donald J. Trump’s 113,000-vote margin of victory in the state in 2016.

But the reality for Democrats is that neither development is likely to fundamentally alter Florida’s political character heading into the 2020 election.

The main reason? The electoral effect dwindles after accounting for the relatively low turnout rates among these groups. More generally, even big demographic shifts that seem to favor Democrats could easily be swamped by other demographic shifts that do the opposite.