is a clip from the new hbo documentary called "citizen usa" and i will talk to the filmmaker alexander pelosi who shows us the faces and those immigrating into this great country. >>> and a new study from harvard claims to show that the fourth of july parades could increase the chances of your children becoming republican, and raise the chance of you voting for the gop candidates. we will look at the science behind that study in today's "newsnation" gut check. ♪ everywhere around the world ♪ they come into america ♪ ooh baby, (what) can i do for you today? ♪ [ female announcer ] need help keeping your digestive balance? align can help. only align has bifantis, a patented probiotic that naturally helps maintain your digestive balance. try align to help retain a balanced digestive system. try the #1 gastroenterologist recommended probiotic. align. right? get. out. exactly! really?! [ mom ] what? shut the front door. right? woop-woop! franklin delano! [ male announcer ] hey! there's oreo creme under that fudge! oreo fudge cremes. indescribably good. ♪ ooh baby, (what) can i do for you today? ♪ [

alexander pelosi, dashes across the nation in a 50-state road trip, looking for answers to that questionm chaser is rolling in to cnn. sean casey in a tank. >> look at that. >> i think they'll let us drive this thing. >> i think they'll let us on it, not drive it. >> only in clear weather. [ mom ] one of the challenges for kayla being gluten-free is actually finding choices the whole family will love. five flavors of chex are gluten-free, including the honey nut flavor. and it's nice for me to be able to say "yes" to something that they want to eat. [ male announcer ] chex cereal. five flavors. gluten free. >>> little arrow aerosmith. i don't know what's going on with thunder. there's thunder and lightning everywhere else and storms. i don't know if we have them coming to new york city. >>> it is independence day. this is, you know, the patriotic day, one of several really big patriotic days of the year. a new documentary that airs tonight by alexander pelosi. >> he travels to all 50 states to ask our newest citizens why they love this country. >> my favorite thing about america is 911.