Democratic Presidential nominee Kamala Harris has much Republican support from those who have served under Ronald Reagan, George H. W. Bush, George W. Bush, and even Donald Trump, along with those who were involved in the John McCain and Mitt Romney Presidential campaigns.
Also, many former Republican Senators and Representatives have endorsed Harris, but sadly the vast majority of present office holders in Congress, and sitting Republican governors, have been unwilling to abandon Donald Trump.
At the same time, if one looks for Democrats who are supporting Donald Trump, the list is very short, including:
Robert F. Kennedy, Jr., who ran for President as an Independent, and then withdrew and endorsed Trump.
Tulsi Gabbard, former Hawaii Congresswoman who was a contender in Democratic Presidential primaries in 2020.
Rod Blagojevich, former Illinois Governor who served time in prison for trying to “sell” the appointment of a US Senator to replace Barack Obama, when he became President. Donald Trump pardoned him after he had served eight years in prison.
Peter Deutsch, former South Florida Congressman, but out of office for the past 20 years.