The impeachment inquiry announced by House Republicans against President Joe Biden centers on his involvement with Ukraine, just as the Eastern European country figured prominently in the first impeachment of President Donald Trump. In fact, both impeachments touch upon the same incident, but from opposite sides.

House Speaker Kevin McCarthy (R-Calif.) announced the impeachment inquiry on Sept. 12, summarizing the results of the investigations to date, including nearly $20 million in alleged payments from foreign sources to the Biden family and associates, the president’s past communications with his son Hunter Biden about his overseas business dealings, as well as whistleblower allegations that the Department of Justice extended special treatment to the Biden family.

“These are allegations of abuse of power, obstruction, and corruption and they warrant further investigation by the House of Representatives,” Mr. McCarthy said.