President Joe Biden is reportedly blaming himself for Hunter Biden’s current legal woes. The president’s son was convicted of three felonies connected to a 2018 purchase of a gun. Prosecutors claimed he lied on a mandatory gun-purchase form by saying he was not illegally using or addicted to drugs. During the trial, the younger Biden’s ex-wife, Kathleen Buhle, and former girlfriends testified he was addicted to cocaine. A jury found him guilty on all counts Tuesday. He faces up to 25 years in prison, but could walk away with probation. Insiders say the elder Biden professed feelings of guilt o…