I feel quite sick at both facts.
Why does the involvement of ordinary people in politics make you sick?
Because this is not the involvement of ordinary people in politics. This is the domination of politics by Mammon.
Mammon supplied by ordinary people...
I'm not sure how manipulating people's emotions in order to get at their wallets is a good thing.
Though a sociological study (a proper one, not a normal sociological study) of the sort of people who throw their money in the general direction of American politicians would be interesting to see.