If he can resign, so can Joe Biden

 Ireland’s Prime Minister Leo Varadkar unexpectedly resigns

Remember all those women who resigned about a year ago?

Jacinda Ardern 

Diane Feinstein (announced she wouldn't run again)

Lael Brainard

Christine Wilson

Nicola Sturgeon

A spate of high profile resignations by women sparked by New Zealand's Ardern in January?

Jacinda Ardern resigns: Departure reveals unique pressures on PM

Sen. Feinstein makes it official: She will retire at the end of her current term

Brainard resigns from the Fed to head to White House economics role

U.S. FTC commissioner Christine Wilson to resign 

Nicola Sturgeon announces shock resignation as Scottish first minister