It could be possible that it's a Delaware accent/dialect thing that makes "I will" sound just like "Iowa". That is the kindest scenario.

The other possibility is that Biden is beginning to slur his speech which is sometimes part of the inevitable decline that those in our age group experience before leaving this life.

FWIW, I have no trouble at all understanding all of our regional accents even Louisiana bayou and Boston!. Maybe it came from my parents insisting that I take a few music lessons when I was a kid. At office parties, I used to do impressions of some of our more memorable clients of the past year. It always had everyone howling. I'm glad I'm retired because it just doesn't seem that enough people have any sense of humor anymore. Too many people are going around now just waiting for any opportunity to be professionally offended