Saw a commercial property on Monday, in New Hampshire. Told landlord I would take it. He told me he would email me a copy of the lease and then get me the keys. (no money yet exchanged) Received an email of the lease with all of our information placed in it. Was told move in date of Aug, 1st- he would put in new carpet, etc. We covered all the details. We were supposed to exchange signatures and money tomorrow but he just informed me (after I called to set up a time) that he showed it to someone else and may rent to them even though he had already committed to me.
Does he have any binding or legal commitment to rent to me as we had a verbal agreement and he emailed me my lease?

If you never really got a signature from him, I don't think you can do anything about it... if you have proof that he agreed to give you the house, and you already started packing up, and told your other landlord that you were moving, you could probably take him to court, that's just about all I know... I'm not really an expert at this stuff, but from what I see on all those court shows, you could do that lol