KEY POINTS
  • President Trump says he will make his announcement on steel and aluminum at a 3:30 pm ET meeting Thursday.
  • The announcement comes a week after Trump said he would institute a 25 percent tariff on steel imports and a 10 percent tariff on aluminum.
  • A White House official told CNBC the president will sign a "legal paper enacting the president's stated objectives with dates of enactment and implementation included."

President Donald Trump said he will make his announcement on steel and aluminum tariffs at a 3:30 p.m. ET meeting Thursday.

The announcement comes a week after Trump said he would institute a 25 percent tariff on steel imports and a 10 percent tariff on aluminum. The move rattled markets as it indicated the president was moving toward more protectionist trade policies.