Elizabeth Warren, Kamala Harris and Cory Booker, among others, said comments made by Robert Mueller should be the impetus for impeaching President Trump.
Booker vowed to remove so-called 'assault weapons' from the streets with a ban, and implied those who refuse to turn those guns in would face consequences.
Iowa is a key state for candidates seeking their party's nomination, and Mike Pence reminded Iowans that Democrats refused to vote for disaster relief.