What battles lie ahead for Cameron’s second turn as PM?

Aired: 5/8/2015 | 0:04:34 | Clip
David Cameron may have held on to power after British elections, but he'll face a number of challenges, including the rising power of the Scottish National Party and a referendum on whether the UK should stay in the European Union. Judy Woodruff talks to Robin Niblett of Chatham House about the election results and how the new lineup affects relations with the U.S.