Pakistan, Feb. 2 -- Colombia had a choice when US President Donald Trump threatened heavy tariffs on it if it did not allow landing of planes loaded with immigrants. Columbia allowed the planes into its airspace and on its airports, and the matter was over. But for China, Canada, and Mexico, choices are sparse and heavy tariffs are a matter of time. Trump has decided to slap new tariffs on imports-25 per cent on goods from Canada and Mexico and 10 per cent on Chinese products. He wants the US people to manufacture products and for themselves. He says it is to stop illegal immigration, drug trafficking and unfair subsidies.

But who pays? Of course, American businesses. If a US company buys car parts from Mexico, it must pay extra. These c...