S.E. Cupp joins LiveNOW from FOX

'Battleground' host S.E. Cupp joins LiveNOW from FOX's Mike Pache to preview day four of the DNC in Chicago. Vice President Kamala Harris is set to accept her party's nomination during a speech in which she is expected to offer her vision and policy agenda. You can watch 'Battleground' on streaming platforms across the U.S.