(CNN) He's visited steel mills in Indiana and movie studios in California, an oil spill in in Louisiana and a landslide in Washington state, military bases from New Jersey to Texas, even Yellowstone National Park in Wyoming.

When President Barack Obama speaks at Hill Air Force Base in Utah on Friday, he'll have traveled to 49 states as president, nearly reaching his goal of stopping in every single one during his eight years in office.

After this week, South Dakota will remain the only state unvisited by the commander in chief, though Obama's aides say he's gunning to reach all 50 by the end of his term.

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"We'd always love to have him," said former Sen. Tom Daschle, D-South Dakota, who shared a stage with Obama in Massachusetts on Monday at the opening of an institute dedicated to the late Sen. Ted Kennedy.