Former President Joe Biden left office in January, but questions about his mental acuity and decline while in office continue ...

California Gov. Gavin Newsom questions Trump's mental and physical ability as their clash over immigration enforcement rages ...

Presidential use of the autopen is not illegal. And Trump admitted that his staff uses the device to mimic his signature on ...

President Donald Trump ordered an investigation into former President Joe Biden’s actions and autopen use in a Wednesday ...

President Donald Trump is directing his administration to investigate Joe Biden’s actions as president, alleging aides masked ...

Former President Joe Biden has been diagnosed with prostate cancer, according to a statement from his office released Sunday ...

The president alleged that his predecessor’s aides hid evidence of what he called Biden’s “serious cognitive decline.” ...

ABC News has broken down what former President Biden's prostate cancer diagnosis means and what possible treatments can be done.

North Korean leader Kim Jong Un led a party meeting on strengthening the military on Wednesday and inspected an artillery drill on Thursday, state media KCNA said on Friday.