“That” was defined in the question he was asked. Stop being obtuse.
And no, and if a democrat ever does, he/she should be subjected to the same litigation.
What all administrations do or have done with various countries is withhold security aid for human rights abuse, maybe illegally invading and occupying another country, or any number of things that harm either national or international interests.
But for a president to withhold American tax payers money, appropriated by Congress to persuade a foreign government to investigate a US citizen that’s running against you for office, UM NO, HELL NO.