Gail Collins: Joe Biden’s best bleeping week

Memo to Joe ...Hey, things are going great. Take it easy.Our former vice president is on a roll. A man who’d never won a primary before in three presidential campaigns pretty much swept the board on Super Tuesdays I & II. This was probably the best week of his entire political career.Except maybe for the visit to an automobile plant in Detroit, where Biden called a union worker “full of s---” while shushing an aide who tried to get him to calm down.It was during an argument