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.

Me: Done.

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.”