Unless things have changed in the last year or so, the last time I checked the Toyota Camry had the highest percentage of US-sourced parts, and is also assembled in Kentucky.
Of course, there is also the consideration of where the profits are going, but that also gets very complicated since profits made by US companies are often used to pay for foreign-sourced stuff. Apple products are largely made off-shore, and the profits come to a US-based company, but then go back off-shore.
All US car manufacturers outsource, but their profits come home, then go back off-shore. There are probably as many, if not more, "foreign cars" manufactured in this country right now, than units from the traditional US manufacturers, and of course that means US citizens with good jobs building those foreign cars. Kias are made in Georgia, Hyundai and Mercedes in Alabama, BMW in SC, Subaru in IN, Toyota in KY, and on and on.
"Buying US" doesn't necessarily mean what many would like to think it does, but I agree that it is important to try to support traditional US companies as sources of national pride. But, as the old saying goes, "it all depends upon how you do the accounting."