Vice President Kamala Harris has jettisoned the progressive policies that defined her 2020 primary campaign in an effort to claim the White House.Chip Somodevilla/Getty ImagesVice President Kamala Harris delivered an impassioned acceptance speech.Harris took care to portray herself as a president who would represent "all Americans."She has tried to recast her image from a progressive fighter to a unifying leader.Vice President Kamala Harris on Thursday delivered an impassioned speech in which she reintroduced herself to the nation, connecting her past representing the people as a prosecutor with a desire to be "a president for all Americans.""I will be a President who unites us around our highest aspirations," she said.