Democrats detail abuse-of-power charge against Trump as Republicans complain of repetitive arguments

House impeachment managers laid out the heart of their abuse-of-power case against President Trump on Thursday — charging that his efforts to pressure Ukraine into political investigations were precisely what the nation’s founders wanted to guard against when they empowered Congress to remove a president from office.

The Democrats also detailed their defense of former vice president Joe Biden’s actions regarding Ukraine in anticipation that it will be a major portion of the White House’s defense later this week, saying Biden’s actions were in line with official U.S. policy at...