The American Red Cross national blood supply has fallen to critically low levels, potentially threatening the medical care of patients with an emergency need for blood.
Individuals who have had anal sex in the last three months may be eligible to donate as long as they did not have sex with someone new or with multiple partners during that timeframe.
I believe in August the rules changed a bit:
https://www.redcrossblood.org/donate-blood/how-to-donate/eligibility-requirements/lgbtq-donors.html