President Donald Trump’s vows to roll out punishing new tariffs on Aug. 1 have barely made a ripple with investors who are convinced he’ll once again back down. But at the White House, officials insist they’re serious this time.

The Trump administration could send more tariff letters or reach new trade agreements before the start of August, White House Press Secretary Karoline Leavitt said Monday. That's when the pause on Trump's so-called reciprocals tariffs are set to expire.

Trump has sent letters to leaders of dozens of countries outlining the tariff levels set to begin on Aug. 1. In recent months, Trump has rolled back some of his steepest tariffs, meaning delays could be possible in the case of the Aug. 1 deadline. The Trump administration appears to have stood largely behind the deadline in recent days, however.

White House press secretary Karoline Leavitt said “there will be approximately 12 other countries that will ... S&P 500 and Nasdaq fall after Trump announces 25% tariffs on Japan, South Korea.

If the rulings had not been reinstated, it would have halted Trump’s 10% baseline tariffs on most foreign trade partners, the 25% levy on Canada and Mexico, and a 20% tariff on China. White ...

The chair of the White House Council of Economic Advisers said that some countries that are negotiating with the U.S. could see tariffs delayed.

White House stresses desire to cut deals amid tariff turmoil “We’ve had talks with many, many countries — over 70,” Trump said. “They all want to come in.

President Donald Trump said on Friday that he was contemplating sending rebate checks to Americans using tariff revenue. The U.S.

National Economic Council Director Kevin Hassett defended Donald Trump’s newly unveiled 50% tariff against Brazil on ABC News' "This Week."