Several top hospital executives have come out in support of Attorney General Maura Healey’s controversial crackdown on assault weapons, expressing “strong support and deep appreciation” for the mandate in a letter sent to Healey this month.

The letter was signed by Baystate Health President and CEO Dr. Mark Keroack; Beth Israel Deaconess Medical Center President and CEO Dr. Kevin Tabb; Boston Children’s Hospital President and CEO Sandra Fenwick; Boston Medical Center President and CEO Kate…