Some Canucks are proposing the most drastic measure yet in the trade war with Uncle Sam – blocking US access to Canadian-owned Pornhub. The idea is the brainchild of funnyman Matthew Puzhitsky, who posted a now-viral Instagram video suggesting the X-rated offensive — calling it Canada’s “nuclear weapon.” Pornhub is the most visited in the US with more than 3 million views a month. “If Canada could ban Pornhub in the states, we win the trade war. That’s it. There is no trade war,” the Toronto stand-up comedian told The Post. A petition has since been launched urging Canadian authorities...