U.S. Secretary of State Marco Rubio is wrapping his up his second and final day at a Southeast Asian security conference with a high-stakes meeting with his Chinese counterpart as tensions grow between Washington and Beijing over issues from trade to security and China's support for Russia's war in Ukraine.

Marco Rubio wants to bolster ties with Asia to counter China’s sway, but President Trump’s tariff threats have nations asking why they should align with Washington.

A federal judge blocked the Trump administration from enforcing a contentious executive order ending birthright citizenship after certifying a challenge by the A.C.L.U. as a class action, effectively...