I have taken the remarks made by both Obama and McCain after the Potomac Primary results were in and constructed another Document Cloud Comparison. As before, a few static images are shown below to give you a flavour but the real fun comes with exploring the interactive application.
If you enter a blank focus string in the application it shows a standard word cloud and colors words that are unique to one speaker or the other. The top words used by Obama and not by McCain include 'change' , 'tax', 'health', 'college', 'bush', 'lobbyists' , 'jobs', 'rich', and 'iraq' . Those used by McCain uniquely include 'promise', 'serve', 'friends', 'strength', 'faith', 'dreams', and 'challenges'.
'Hope' Associations and References (static image)
'War' Associations and References (static image)
Give it a try yourself. The application is written in Java so you may have to wait a few seconds for it to start up.
The interactive application: