Stocks on Wall Street surrendered early gains and closed broadly lower Friday after the White House said President Donald Trump would impose promised tariffs on key U.S. trading partners.

The S&P 500 fell 0.5% and the Nasdaq composite dropped 0.3%. The indexes, which had posted solid gains in morning trading, posted their first weekly loss in three weeks.

The Dow Jones Industrial Average fell 0.8%.

Trump will put in place 25% tariffs on imports from Canada and Mexico and 10% tariffs on goods from China effective Saturday.

Thousands of Costco workers prepare to strike

Thousands of Costco workers prepared to strike with a midnight deadline drawing closer Friday while the worker’s union and the company negotiated.

The Teamsters union represents 18,000 Costco workers in six states: California, Washington, Maryland, Virginia, New Jersey and New York.

It’s unclear if the strikes would close stores. Costco has 219,000 U.S. employees and 617 U.S. stores. The company said its labor agreement with the Teamsters applies to less than 10% of those stores.

Senate confirms Doug Burgum as interior secretary

The Senate confirmed Doug Burgum as interior secretary late Thursday after President Donald Trump tapped the former North Dakota governor to spearhead the Republican administration’s ambitions to boost fossil fuel production.

The vote was 79-18. More than half of Senate Democrats joined all 53 Republicans in voting for Burgum.