Premarket: U.S. stock futures as Trump's tariffs hit court roadblock

European stocks and Wall Street futures rose on Thursday after a U.S. federal court blocked President Donald Trump's so-called "Liberation Day" tariffs from going into effect, sending the dollar up on safe-haven currencies. The little-known Manhattan-based Court of International Trade ruled that Trump overstepped his authority by imposing his April 2 across-the-board duties on imports from U.S. trading partners. The White House quickly appealed the decision, and could take it all the way to the Supreme Court if needed. But in the meantime, it offered some hope that Trump might back away from the highest tariff levels he had threatened….