An upcoming documentary released by President Barack Obama’s re-election campaign seeks to portray the president as a determined figure who took on a series of difficult challenges during his first term.Obama’s campaign has released a trailer to "The Road We’ve Traveled,” narrated by actor Tom Hanks.The trailer includes interviews with Vice President Joe Biden, Chicago Mayor Rahm Emanuel and others who describe Obama’s response to the economic downturn, health care reform, the bailout of the auto industry and the U.S. raid that killed Osama bin Laden.Republicans are panning the film, saying Obama’s policies led to high unemployment and record debt.The 17-minute documentary was directed by Davis Guggenheim and will be released on March 15 at campaign field offices across the nation.