The van floated downstream a few feet in the river north of Atlanta and then became "totally submerged," police said.
Cabot, named for explorer John Cabot, was tracked in South Carolina and North Carolina in April and made his way to the Delaware Bay last week.
"This would be establishing California as a counter to federal policies, both around health care and immigration," said Larry Levitt, of the Kaiser Family Foundation.
As many as 67 tornadoes were reported from Friday to Sunday in Texas, Oklahoma, Louisiana, Kansas and Nebraska.
That's All, Brother was at the tip of about 900 planes that made the 1944 flight across the English Channel to drop some 13,000 paratroopers in all.