India, July 14 -- Former US President Joe Biden has dismissed Republican-led allegations questioning the legitimacy of clemency decisions issued at the end of his term. The Democrat has asserted that he had "orally granted all the pardons" and authorized the use of an autopen to sign documents.

The statement came amid ongoing investigations launched by US President Donald Trump's administration, the Justice Department, and Congressional Republicans into Biden's mental acuity and the legality of several high-profile pardons made during his final weeks in office.

"I made every decision," Biden told The New York Times in a phone interview on Thursday. He added that the use of the autopen-an authorized mechanical device replicating his sign...