Former US President Joe Biden was so disoriented while in office that he would get lost inside his closet at the White House, senator Josh Hawley claimed.“This secret service whistleblower actually was assigned to Biden,” the Missouri Republican told Fox News host Sean Hannity.“I mean, the guy literally stumbling around in the White House residence couldn’t find his way out of his own closet,” Hawley continued. “The president of the United States. This is outrageous. We were lied to.”Hawley cited the alleged incident while discussing his conversations with multiple secret service agents during a separate investigation into assassination attempts against US President Trump. He argued the Biden administration and media were covering up Biden’s mental decline, calling it one of the biggest scandals in presidential history.The senator’s remarks come as several congressional investigations examine the 82-year-old former president’s cognitive condition and whether his staff took on presidential responsibilities without his knowledge.House oversight committee chairman James Comer is investigating reports that Biden’s staff may have used an autopen to sign White House directives and pardons without informing him.Comer has also asked Dr Kevin O’Connor, Biden’s physician, to testify, raising doubts about the accuracy of public health reports released during Biden’s term.Earlier this month, Biden revealed he is battling an aggressive form of prostate cancer, prompting questions about whether his diagnosis had been hidden during his time in office.Meanwhile, senators Eric Schmitt and John Cornyn are planning a hearing next month to address concerns over Biden’s mental fitness. Cornyn warned on Fox News that the situation presents a constitutional crisis.“The question is: Who is in charge? Whose finger is on the nuclear button or has the nuclear codes?Cornyn asked. “Who can declare war? How do we defend the nation when we have basically an absent president? And those are constitutional issues we need to address and correct.” Hawley said Americans were misled by the White House and media about Biden’s condition. “Now we’ve got to get the facts,” he said, calling the situation “a huge stain” on the country.