Originally Posted by gonzalesflyer

I'm not sure how it is in the US but in most countries claiming to have lost your passport when you haven't would get you in serious trouble if discovered. So I wouldn't do that. If you're travelling within N America and you have nexus or similar I think you could use that or obviously if you're a dual citizen then you could use your other passport. Other than that I think you will have to cancel the first trip or try to get your passport back early and get the Russian visa later.