India, March 4 -- The major U.S. index futures are currently pointing to a lower open on Tuesday, with stocks likely to see further downside after coming under pressure over the course of the previous session.

Concerns about a global trade war are likely to weigh on Wall Street after President Donald Trump's tariffs on imports from Canada, Mexico and China took effect.

The White House said Trump is proceeding with implementing previously paused 25 percent tariffs on Canada and Mexico to combat the extraordinary threat to U.S. national security posed by unchecked drug trafficking.

Trump also increased the tariff on Chinese imports to 20 percent from 10 percent, claiming the country has not taken adequate steps to alleviate the illicit dru...