GOP Impeachment Push Falters as Memo Shows Biden Acted on Established US Policy in Urging Ukrainian Prosecutor's Ouster

Republican efforts to impeach Biden suffered after memo showed removing Ukrainian prosecutor was US policy

Memo called for prosecutor Shokin's removal, said he was an obstacle to fighting corruption

Shokin claimed he was investigating Burisma when removed, but no records confirm this

Biden previously said he threatened to withhold aid unless Shokin was fired

Any impeachment unlikely to succeed given Democratic Senate majority, despite GOP Speaker McCarthy's inquiry