Today's top stories, with context, in just 15 minutes.

On today's podcast:
1) The Trump administration is working to narrow its broad tariffs on steel and aluminum products that companies find difficult to calculate and the European Union wants reined in as part of its pending trade deal with the US, a person familiar with the matter said. The US Trade Representative’s Office is scrambling to resolve complications spawned last year by the Commerce Department’s efforts to rush out President Trump’s tariff agenda, the person said. The White House has communicated to companies that adjustments are in the works, but details and timing remain unclear.
2) President Trump said his administration has rescinded the “endangerment finding,” a landmark scientific determination that greenhouse gases pose a threat to human health and welfare. The 2009 finding serves as the legal foundation for a variety of environmental rules, including federal climate standards for cars and trucks. Trump said he’s also repealing those vehicle-related standards. The decision to repeal, which has been telegraphed for months, lays the groundwork for unwinding more federal climate regulations, according to environmental and legal experts. Thursday’s announcement, made alongside Environmental Protection Agency Administrator Lee Zeldin, marks the administration’s most consequential climate rollback, as well as its biggest deregulatory move.
3) A Saturday shutdown of the Department of Homeland Security is all but inevitable after the Senate failed to advance a funding bill and headed out on a week-long recess without a deal regarding new limits on immigration enforcement. The Senate vote to begin debate on a year-long DHS bill without enforcement changes failed 52 to 47. A Republican attempt to get unanimous consent to pass a stopgap DHS bill also failed. Many department employees will be expected to work without pay during a shutdown. But a prolonged fight risks roiling workers like Transportation Security Administration employees at airports. Those carrying out immigration enforcement activities at Immigration and Customs Enforcement and Customs and Border Protection will likely be paid even during a longer shutdown by funds allocated under President Trump’s tax bill.

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US to Narrow Metals Tariffs; DHS Shutdown Looms as Senate Fails to Cut Deal

Bloomberg Daybreak: US Edition