Seller Backing out...How do I cloud the title??

[Mike Nelson]

I've been dealing with this seller for about a month now and he doesn't like the closing attorney that we are working with. I'll agree that the attorny has been making the seller jump through hoops but I'm trying to get this deal done. To make a long story short, I still have a valid contract but my seller told me that he will now sell the property to another investor.

My question is, how do I prevent this from happening? I know that I can record the contract and cloud the title but how do I go about this in Washington D.C?