Please try to be realistic as possible. Assuming Ron isn't elected, when do we think it will happen?
I'd say between 1 and 10 years from now -- but it's more likely to be a process than an event. It may already be too late for RP to stop it if he's elected. The Ship of State is awfully big creature, with huge momentum all its own.
Will everyone's stocks become immediately worthless?
No, not everyone's and not immediately. Some stocks will periodically become worthless. An equally significant problem is that counterparty risk will continue to climb, as the stability of brokerages and exchanges becomes increasingly doubtful (like MF Global).
Will the dollar collapse?
The dollar has already lost 90% of its value, just in the last 40 years. The way things are going now, that's likely to accelerate. We may see another brief round of deflation, but accelerating inflation is the more likely path in the long term. Today's inflation is in the form of the things you buy, not in wages, which will continue to squeeze consumers.
When the dollar collapse does every cent I have in my savings account get wiped out and never to be redeemed?
Some banks fail almost every week (announced on Fridays on the FDIC website). Most depositors get most of their savings back, but usually only after some delay. When it happened in Argentina, between the time the banks closed their doors and when deposits were available again, the currency had lost something like 40% of its value. In a time of extreme crisis in the US, you can bet that any remaining repositories of wealth will be raided, one way or the other. Pension funds and retirement accounts, for example, already have a big target painted on them.
Does this mean everyone is a fool for having any substantial savings in cash and should be converting it all to gold and silver?
Cash has its place, and holding cash is different than holding money in a bank. There is risk with cash, and there's risk with metals. The most prudent path is probably some combination.
Will there be a civil war that outbreaks and riots in the streets?
It's not impossible. However, I feel civil war is unlikely until/unless the government starts actively, visibly killing its own citizens. Civil unrest, though, like the occupy movements, will almost certainly increase.
I think there's a very good chance of that, yes. Probably not all foods at once, but select foods could easily become difficult to find, particularly in the event of supply-chain disruptions -- trucker strikes, fuel shortages, and the like.
One thing you didn't mention is gasoline prices. I expect them to continue to ratchet up-then-down-then-higher. As high prices slow the economy, prices will go down. Then as production peaks kick in again, prices go back up. Then the process repeats.
Another issue is the risk of holding debt. While inflation can help debtors, if the cost of the things you buy goes up fast enough without wages going up too, it can quickly soak up the income you're using to pay off debt, which makes default more likely. Defaulting on debt is likely to become increasingly difficult and problematic as time goes on. The nature of student loans, where you can use bankruptcy to escape them, is an example of probable future trends.
(paranoia) 
