By Ruth Marcus
Could Joe Biden be the man for this season?
The vice president has been running for president since Hillary Clinton was first lady of Arkansas. His first campaign, in 1988, fizzled over allegations of plagiarism.
His second, in 2008, limped to a humiliating close with Biden winning less than 1 percent of voters in the Iowa caucuses. He received most attention for unwise comments about Indian Americans (“You cannot go to a 7-Eleven or a Dunkin’…