The Washington Post reports:
President Trump repeatedly involved Vice President Pence in efforts to exert pressure on the leader of Ukraine at a time when the president was using other channels to solicit information that he hoped would be damaging to a Democratic rival, current and former U.S. officials said.
Trump instructed Pence not to attend the inauguration of Ukrainian President Volodymyr Zelensky in May — an event White House officials had pushed to put on the vice president’s calendar — at a time when Ukraine’s new leader was seeking recognition and support from Washington, the officials said.
Months later, the president used Pence to tell Zelensky that U.S. aid was still being withheld while demanding more aggressive action on corruption, officials said. At that time — following Trump’s July 25 phone call with Zelenksy — the Ukrainians probably understood action on corruption to include the investigation of former vice president Joe Biden and his son Hunter Biden.