From President Trump’s stonewalling of Congress to the trade war with China, it’s been a busy week in American politics. Here are some of the biggest stories you might have missed (and some links if you’d like to read further).

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Tension between Trump and Congress escalates.

The fight over President Trump’s stonewalling of Congress escalated on two fronts on Monday. A judge ruled that his accounting firm must turn over his financial records to Congress, while separately, Mr. Trump moved to block Congress from receiving testimony by the former White House counsel Donald F. McGahn II. The fights raise the issue of what power the president has to keep secrets from Congress.

Mr. Trump abruptly blew up a meeting with Democratic congressional leaders on Wednesday, declaring that he could not work with them until they stopped investigating him and lashing out at Speaker Nancy Pelosi for accusing him of a “cover-up.” He later held a hastily called news conference in the Rose Garden to denounce House Democrats and the Mueller investigation.

The president took extraordinary steps on Thursday to give Attorney General William P. Barr sweeping new authorities to conduct a review into how the 2016 Trump campaign’s ties to Russia were investigated, further testing congressional oversight and putting at risk a C.I.A. informant close to President Vladimir V. Putin of Russia.