Florida Sen. Marco Rubio is pushing back on an attempt by the Biden administration to erase preserving life from the mission of the National Institutes of Health. Last week, the Florida Republican sent a letter to NIH Director Monica Bertagnolli that questioned whether her agency was moving toward adopting or promoting doctor-assisted suicide for Americans. Two words led Rubio to suspect that. Read: Trump Says As President He’ll Send Texas “Reinforcements” Instead Of Restraining Order Last August, according to his letter, which was also signed by Democratic Sen. Tammy Duckworth of Illinois, th…