The nationwide baby formula shortage is getting worse

Baby formula is getting even harder to come by at retailers across the U.S., amid a nationwide shortage of one of the most important products for new parents. 

The shortage is so dire that Republican Sen. Tom Cotton of Arkansas on Monday called the situation "a national crisis" on Twitter. 

"The FDA needs to immediately step up, be transparent, explain how it will get production restarted, and give parents a timeline. And the Biden Administration needs to take this seriously," he tweeted.