I'm not familiar with the chemistry of taggants. They are there to trace the purchase of chemicals. Not exactly a liberal idea.. as for Schumer being a liberal, he's not. He's a statist who thinks killing prisoners is a solution to crime. He's also a drug warrior. Anyhoo,..
And yes, Schumer IS a liberal. The biggest gun-grabber in the country, with a clearly documented record of such, going back to his time as DA in NYC. Just check his record with the American Conservative Union and then tell me he isn't a liberal.