Seems like her primary goal is to virtue signal to US liberals,not to help her people. Because the Trump administration is already providing help over and above of the what the US would normally provide.
Dude Puerto Rico was just hit by a huge hurricane. What you are saying is disgusting.
None of this was political until the mayor turned around and said to the US/USG "We are dying and you are killing us". Pointing out that she and local authorities were responsible for coordinating on-the-ground infrastructure is perfectly fair game.