Of course. For many people "buy American" is a mantra. People from car makers to American Apparel try to tap into this sentiment. (obviously the degree to which something was actually "made in the USA" is not always clear)
Some Americans care about "buy[ing] American", but most don't. A prime example is the Japanese auto manufacturers taking market share away from American companies with better quality cars since the 80s, eventually becoming dominant.
Not to mention that the US isn't the only market for smartphones out there, so a large portion of the market certainly don't care if something is manufactured in the US.
Making quality software is probably the biggest opportunity for RIM right now, not the location of manufacture.