Enjoying the services provided by the likes of Uber? Then don't vote for Democratic front-runner Hillary Clinton, anti-tax crusader Grover Norquist said Tuesday.

"Hillary Clinton has decided that, if she's elected, there's going to be a war on Uber and the entire sharing economy because she wants to 'crack down' on independent contractor arrangements," the founder and president of Americans for Tax Reform told CNBC's "Squawk Box."

Clinton said last summer that, by classifying employees as contractors, employers can exploit "or even steal their wages."