[L'article Riposte canadienne aux tarifs douaniers américains – voici l’essentiel  a d'abord été publié dans InfoBref.]

US president’s lawyers in court filing say Washington arts complex must undergo repairs or risk demolition

The John F Kennedy Center for the Performing Arts could be demolished if repairs are not carried out, the Trump administration warned in a court filing on Monday.

Lawyers for the US president said the national arts complex in Washington DC must undergo a $250m renovation or risk facing the wrecking ball.

Tariffs on Canada, threats against Iran’s partners and bond market intervention show a president weaponising US power while making Americans poorer at home

Three moves in the last week have exposed the limits of Donald Trump’s economic bullying. The US slapped 50% tariffs on another $20bn of Canadian goods – then threatened the same rate on the cars, trucks, parts and steel that America Inc depends on. On Monday, the Treasury secretary, Scott Bessent, menaced Iran’s trading partners with exclusion from the US financial network, hoping that coercion can deliver what months of war have not. And as the costs of war, tariffs and pro-billionaire tax cuts helped send US bond yields higher, the Treasury stepped in to tame long-term rates. These are not contradictory policies but a gamble: that US economic power can be repeatedly weaponised without reducing others’ willingness to depend on it.

The Trump administration’s “D-day” sanctions are potentially the most consequential because they expose the scaffolding of American financial power. While markets shrugged off the immediate threat, that calculation might change were the US to target a major Chinese refinery or bank. Such an escalation could spark a trade war with Beijing. The US has leverage. But China has pressure points – especially farmers in Republican states – that make using it costly. In the long run, there is a price to pay. Nations hold one another’s currencies partly because they trust the political relationship. Mr Trump is testing what happens when they don’t.

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On Truth Social, however, the president shot down assertions that the US talks with Canada collapsed in part due a proposed trade deal that would have weakened French language protections.

“I would never interfere with Canadians speaking French!” he wrote. “In fact, I have never even thought of doing such a stupid thing. This lie was made up by a weak and ineffective Prime Minister in an attempt to gain political support, which he has totally lost, from the people of Quebec.”

A recent memo claiming executive privilege over communications with private advisers invites corruption

A recent office of legal counsel memo on executive privilege maintains that private advisers to a president can avoid responding to a subpoena by asserting the president’s executive privilege. The ability of presidents to shield communications from public view through claims of executive privilege, whether their own or those of a senior adviser, was already a powerful tool for presidents to avoid accountability. But if courts accept the OLC’s new interpretation of presidential privilege, it will be substantially harder to call witnesses to testify before Congress or in court proceedings regarding possible wrongdoing by the presidents.

Equipping presidents with extensive power to block witnesses in legal proceedings is a dangerous practice that invites corruption by presidents and their advisers. Consider the former White House counsel Don McGahn’s 2019 refusal to testify in response to a subpoena by the House judiciary committee in connection with the special counsel Robert Mueller’s investigation into Donald Trump. McGahn didn’t come up with that idea on his own. It was the Trump White House that sought to bar McGahn from testifying through an assertion of a type of executive privilege known as “testimonial immunity.” Ironically, Mueller was investigating whether Trump obstructed justice, among other things, by demanding that McGahn fire Mueller himself. Trump’s insistence that McGahn not testify, backed up by a 2019 OLC opinion, effectively made the first Trump administration complicit in the very obstruction under investigation.