Sam Ruby notes that the White House feed contains a fair bit of debris:

Also noted in the process: the feed itself contains a fair amount of debris.  A sytle attribute?  A meta tag?  o:p is common in content carelessly copy/pasted from Microsoft Word. Ah the good old o:p crud from Word.  I know a fantastic html editor they could use that would fix that up for them. Clean copy and paste from Word is probably the most popular feature in EditLive!