I have few questions regarding US Visa ( I am a refugee in Canada with RTD and PR)
1- Do I have to provide any financial documents?
2- My passport is expired. so I will be only using RTD. would this affect the probability?
3- I do not have any contact in USA- Do I have to Book a hotel and make reservations before applying?
1.- I would advice to bring with you any supporting documents that proves you have enough funds to travel to the U.S. for the period and purpose you are intending to travel.. that is, bank Statements, Proof of Employment.. etc..etc.. In my case they did not ask for any of those documents, but you never know.. better safe than sorry..
2.- I don't think so.. My national passport and U.S. visa are valid, but they are also seized by the Canadian government, The Visa officer asked for my current visa, All I told them was: "My current VISA and National passport were seized by the Canadian Government" and I got the VISA.. I think your probability is based more on what are the odds on you overstaying in the US, not which Immigration Document you use.. That bring us to the first question, the more you convince the V.O. of your ties to Canada, the more likely you'll get your visa approved..
3.- No.. that's not necessary.. but be prepared to answer questions like.. "which city are you planning to visit?", "for how long are you planning to stay?" and "do you have close family anywhere in the U.S.?"
Good luck...