PHOENIX — A new state law barring schools from imposing mask mandates on students and staff is unconstitutional, a judge ruled Monday. The law, passed by the Republican-led Legislature and signed by ...

About 10 minutes into the astonishing news conference at which President Trump celebrated the lightning-strike operation to abduct Venezuela’s president, Nicolás Maduro, Trump wandered into a rambling ...

Lipoprotein (a) is a low-density lipoprotein that transports cholesterol in the blood. The lipoprotein (a) test — or Lp(a) test — determines the level of this lipoprotein in the blood, and its results ...