U.S. President Donald Trump vowed to push forward with his aggressive tariff regime in the coming days, stressing he would not offer additional extensions on country-specific levies set to now hit in early August while indicating he could announce substantial new rates on imports of copper and pharmaceuticals.

The posturing on social media and at a Cabinet meeting on Tuesday came after traders initially shrugged off a series of letters and executive actions Trump issued Monday, pushing back the deadline for his "reciprocal” tariffs while announcing the latest rates he planned for more than a dozen countries that had not succeeded in brokering quick trade agreements.

That changed Tuesday as Trump signaled a renewed determination to push ahead with his plans to heavily tax foreign imports.