Me: I have this bushel of corn to sell you.
You: I have this fifty-cent piece I’ll give you if you give me that corn.
Me: Can’t do that; this corn cost me more than that in time, money, and equipment to grow. Ten bucks works.
You: Too much. You can amortize those costs over all your corn; you’re only trying to sell me a single bushel. Six-fifty.
But that was a case where both parties were willing and interested in reaching an agreement. In DC, Progressive compromise means “Do it my way, or no deal.”