I am about to go on a trip in Brasil. I have a US passport and a Romanian passport. I would like to enter Brasil with the Romanian passport as it seems cheaper and more hassle free. Would this be a problem coming back into US (I would have to show my US passport entering US - there will be no Brasil stamp on it). Would I have to show both passports at the exit in US - the Romanian one with the visa on it and the US one?
Would appreciate any constructive feedback on this.