Obama will get updates from federal officials on the response in Flint, a mostly African-American city where more than 40 percent live in poverty.
We don’t routinely collect water lead levels in homes of children who have elevated blood lead levels.
The residents allege that officials failed to take action to end the ongoing contamination.
The candidates met Thursday in Detroit, which is 70 miles from the ongoing water crisis in Flint, Michigan.
Susan Hedman’s resignation comes as criticism of both the state and federal response to the toxic-water crisis continues to grow.
Drinking water in Flint, Michigan, was contaminated with high levels of lead after the state switched supply sources.
One of Snyder's aides warned the crisis could become "political football."
Rev. Jesse Jackson said on Sunday that Flint, Michigan is a "disaster zone."