There are a number of sources of domestic oil, the problem is.... well, refer to my previous statement.
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It's simply false to say that we have no untapped reserves besides ANWR. The trouble is, our government has put most of it off-limits or buried it behind so much beaurocratic red tape that it can't be gotten cost effectively.
Regardless, you still have no convincing argument for why the oil in ANWR should be saved. Your oil doomsday theories dont square with you argument. Even if you were right (and you're not) that it was our last untapped reserve, there is no point in leaving it undeveloped. You argue that we need to transition from oil now, because it will take too long to to change over when we wake up one day and have no oil (more fantasy), yet you're saying that we'll have the 10 years needed to develop ANWR?