his is 100% a political ploy to get the Venezuelan vote for Trump (Rubio gets the tangential benefit of it as well) in 2020 in Florida.
Is Florida a key state when it comes to votes?
Trump CAN NOT win re-election without winning Florida. Trump barely won Florida in 2016 (won by ~1%) he is doing all he can to shore up Florida. This entire Venezuela thing is designed to help Trump in Florida 2020.
Florida has 29 electoral votes and it will be very difficult (or impossible) for either of the two mainstream candidates to win the POTUS elections without winning the sunshine state. But what I don't understand is how the intervention in Venezuela can influence the voters in FL. There is a large Cuban American community in Florida, but the Venezuelan immigrants are not significant. Trump is not going to get any additional votes from the Hispanics, in case he topples Maduro in Venezuela.