WASHINGTON (AP) — The more concrete the testimony in the impeachment inquiry, the more solidly Republicans are sticking with President Donald Trump.

Witness after witness in closed-door House hearings is corroborating the core facts that Democrats say make a strong case against the president.

Trump pressured Ukraine, an American ally, for an investigation of Joe Biden, his family and the Democrats. At the same time, the Trump administration withheld military assistance for the young democracy as it confronted Russian aggression.

For Democrats, it adds up to a nothing short of a brazen abuse of...