Such moves signal the U.S. is no longer interested in upholding the liberal values and rules-based international order it has championed since the end of World War II, Prof. Wang said.

Due to the significantly smaller system size, the computational effort required to solve the ACMA system is drastically reduced in comparison with the conventional full-order CMA. For the same reason ...

In his first three weeks, President Trump has pushed the government’s checks and balances designed to limit executive power. Here’s a look at how the system works, what’s happening now, and ...