It now seems highly likely that former Vice President Joe Biden will win the majority of the remaining primaries, although it is certainly still mathematically possible that Vermont Senator Bernie Sanders could reverse his present losing fortunes.
It is time to start thinking about who could complement Joe Biden, and be of assistance in case he starts to have major cognitive problems, which Donald Trump has already demonstrated.
It would seem wise for Joe Biden to select a Vice Presidential running mate who would be a step forward, so therefore, a straight white male is probably not a good idea.
Probably a woman would be best, and hopefully someone far more qualified than Geraldine Ferraro in 1984 or Sarah Palin in 2008.
Good possibilities include Minnesota Senator Amy Klobuchar; California Senator Kamala Harris; or Michigan Governor Gretchen Whitmer.
Former San Antonio Mayor and Secretary of Housing and Urban Development Julian Castro would be a strong contender, and would draw more Latinos to vote in Texas, Arizona, North Carolina and Florida.
Former South Bend, Indiana Mayor Pete Buttigieg has a bright future, and Biden is very impressed with him, and has compared him to his dead son, Beau Biden. The fact that Pete is gay and has a husband would not have much effect, except among extremist religious groups, such as right wing evangelical Christians, conservative Catholics, and Orthodox Jews, but none of those groups are likely to vote Democratic anyway.
There are others that have been talked about, but right now, this author and blogger would suggest one of the above group.