Gay president? We should be past that. Same question was asked about first Catholic. And the first Hollywood actor. And first black president. And will about gay, Jew, Muslim, rap star, ginger, woman, etc.
The question is asked by those who profit from division.
The way I see it (which is of course the most appropriate) is that we are hiring someone for a temp job lasting four years, and we have the option to renew. When I hire someone, I want the best person for the job. Period. Full stop. I pay well, provide good benefits, and respect the people I work with. I don't care what color underwear they wear or what God they worship and neither do my patients.
Regarding the candidate specifically, I don't know enough about him or his politics to know whether I would support him.