BETTENDORF, Iowa (Reuters) - President Barack Obama defended his economic record on Tuesday on a visit to Iowa, reminding voters in a state that could be crucial to his re-election that they helped send him to the White House. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=tKkKrIkNQPk:5hokunNu0lw:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=tKkKrIkNQPk:5hokunNu0lw:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/tKkKrIkNQPk)