Joe Biden lives in Wilmington. Former Democratic nominee candidate Pete Buttigieg was mayor of South Bend, Indiana.
So it's suggesting it's interesting that the two are meeting. Not sure why that would be all that interesting though, as Biden has already said his VP candidate will be a woman. So maybe the two just wanted to hang out together.
And Keyblade probably didn't think the substance of the tweet was all that exciting, more the tweeter's similar MO to thetrees and his history of spotting Randy Lerner's (and others') planes into BHX and what it might have meant for Villa.