Seth Mitchells News Today

goff. and this morning, isaac is gaining speed. >> this is a huge system with its sights set on the u.s. gulf coast. >> canceling classes for schoolchildren tomorrow. republicans are pushing back the start of their convention until tuesday. nbcs daniel lee reports from pensacola, florida. >> reporter: a devastating scene in haiti as isaac flooded shelters and killing at least four. the damage was a window into isaacs strength. its stretching 200 miles and heading towards florida. u.s. ...