Over 100 former Republican officials have publicly declared their support for Democratic presidential candidate Kamala Harris, labeling Donald Trump as "unfit to serve" another term in the White House. In a joint letter released on Wednesday, these former national security and foreign policy officials, who served under Republican presidents Ronald Reagan, George H.W. Bush, George W. Bush, and Donald Trump, as well as Democratic presidents Bill Clinton and Barack Obama, expressed their endorsement for Harris in the upcoming November election. The group also includes several former Republican members of Congress, highlighting a significant bipartisan shift as they rally behind Harris in contrast to Trump.