CLAYMONT, Del. (AP) — President Joe Biden told Indo-Pacific allies on Saturday that he believes China’s increasing military assertiveness is an effort to test the region at a turbulent moment for Beijing. Biden's comments were caught by a hot mic after he and fellow leaders of the so-called Quad delivered opening remarks before the press at a summit he’s hosting near his hometown of Wilmington, Delaware. He said his administration sees Beijing’s actions as a “change in tactic, not a change in