The Trump administration has launched an investigation into the effects on national security of importing semiconductors and pharmaceutical products, according to Federal Register filings on Monday.

The Commerce Department, in a pair of Federal Register notices set to be published on April 16, said that the probes were initiated under Section 232 of the Trade Expansion Act—which allows the president to impose tariffs on imports considered a threat to national security.

President Donald Trump urged lawmakers Tuesday night during his first joint address to Congress of his second term to repeal the CHIPS and Science Act.

The $280 billion bill, passed with bipartisan support and signed into law by former President Joe Biden in 2022, provided $52 billion for U.S. companies to produce computer chips that were in critical demand, as well as tens of billions more to boost semiconductor manufacturing, advance scientific research, and combat China by strengthening U.S. competitiveness.

Chip giant Taiwan Semiconductor Manufacturing Co. plans to invest $100 billion in the United States, President Donald Trump said Monday, on top of $65 billion in investments the company had previously announced.

TSMC, the world’s biggest semiconductor manufacturer, produces chips for companies including Apple, Intel and Nvidia. The company had already begun constructing three plants in Arizona after the Biden administration offered billions in subsidies. Its first factory in Arizona has started mass production of its 4-nanometer chips.

Elon Musk claims he can grow Tesla into “a leader in AI & robotics,” an ambition that he’s said will require a lot of pricey processors from Nvidia to build up its infrastructure.

President Joe Biden is expected to quadruple tariffs on electric vehicles from China from roughly 25% to 100%, and raise other tariffs on key industries including semiconductors, solar, and batteries in an announcement Tuesday, according to a source familiar with the decision.

U.S. President Joe Biden is set to announce new China tariffs as soon as Tuesday, targeting sectors including electric vehicles, medical supplies and solar equipment, according to people familiar with the matter.

The expected move by the Biden administration comes ahead of the November presidential election. Biden, a Democrat seeking re-election, has taken a tough-on-China approach that would maintain existing tariffs on many Chinese goods set by former President Donald Trump, his expected Republican challenger.

The White House is set to announce new China tariffs as soon as next week, with a levy on electric vehicles and other clean energy goods.

The full announcement is expected on Tuesday and will target solar goods, critical minerals, and batteries from China, according to reporting from the Wall Street Journal. The Biden administration has invested in these industries domestically. The White House did not respond to a request for comment.

Giant factories are rising up in the desert all around this city. It’s ground zero for President Biden’s massive bet that he can bring back to America one of the 21st century’s most important manufacturing jobs: making semiconductor chips. Congress approved $53 billion in funding, and the White House has just announced preliminary agreements to give billions in grants to corporations such as Intel, TSMC and Micron. Now comes the greatest challenge of all: finding enough workers to make it a reality.