Yes, a lot of the difference between the Republican and Democrat numbers comes from the huge number of deaths in the New York area. New York, New Jersey, and Connecticut all have Democratic governors, and they grossly underestimated the seriousness of the outbreak there. Their policies of sending infected patients to nursing homes contributed to the high death rates.
There is also a good case that failure to quarantine the New York area spread the disease around the country and resulted in thousands of deaths. Trump floated the idea, but Cuomo vigorously objected and threatened to take legal action against any attempt to restrict travelers from New York.
Ironically Cuomo is now requiring a quarantine on travelers from a long list of states that his policies arguably helped to infect. The CDC says travelers from the Northeast may be a big factor in the outbreaks in the southern US:
