Instead of Trending R the better question is how Florida is still competitive despite demographic changes. And its basically because the Republicans have been able to push for more white votes.
Rick Scott won 45% of hispanic voters if we to believe CNN exit poll
I read Scott did reasonably well among Puerto rican voters in Florida (the article claimed Scott has been supportive to Post-Maria Puerto ricans moving to Florida).
which is surprising.....
Scott also did a ton of outreach to Puerto Ricans, which Nelson failed to do until it was too late.