If masks work, then why is the China virus spreading? People have been wearing masks for months now. And BTW, the examples of the spread and casualties of the virus that you bring up in CA and NY are run by libs, and no, it's not Trump's fault about the virus spread. Governors run states.
Look at the 4 states hit hardest. CA and NY have liberal governors and TX and FL have conservative governors. This is not a liberal vs conservative issue at all.