Thank you. I suspect that's the case, that I'll have to file for dual status, with the cut-off being my arrival date: before Apr 12, no income; after Apr 12, all my income from the US and Sweden.
I also have the possibility to file jointly with my spouse, and I've heard that would make me a tax resident for the whole year. Isn't that a bit counter-intuitive, that I'll then have to pay tax for the 4 months' salary before I even became a resident in the States? Or do the perks of filing jointly make it worth?