I have not seen any sign that threads have been deleted because of their political bias. Some have been closed because they were redundant, or because their ratio of spite to acceptable content got a bit too toxic.
If you have had a thread deleted for reasons you do not understand, please PM Joe Offer and get an explanation. He is generally reasonable and easy to work with if not pushed too far.
Obama's appeal, as demonstrated in today's speech, is clear, and it stands out as much more commanding and insightful than either of Hillary or John in their dinged up battle armor, creaking and bloviating, do.