Vice-President Joe Biden at the Democratic National Convention
Ahsanul Huq/VOA
<a rel="nofollow" class="external free" href="http://www.voanews.com/content/obama-makes-case-for-clinton-to-follow-him-as-president/3438155.html">http://www.voanews.com/content/obama-makes-case-for-clinton-to-follow-him-as-president/3438155.html</a>