Bushes and Clintons have been cozy for years. Two sides of the same coin.
Clinton and George Bush Sr. were practically inseparable for a while, traveling on joint speaking tours in the early 2000's. I guess it brought back fond memories of working together at Mena, Arkansas in the good old days.
Try telling that to die-hard Clintonite liberals or misguided Republicans who still think that Bush was some kind of conservative messiah.