Vice President Kamala Harris on Saturday responded to Donald Trump’s challenge for a Fox News debate on Sept. 4 after the former president backed out of a scheduled ABC News debate on Sept. 10. Trump last month released a statement that appeared to walk back his commitment to attend the Sept. 10 debate moderated by ABC News. “There is a strong sense by many in the Democrat Party – namely Barack Hussein Obama – that Kamala Harris is a Marxist fraud who cannot beat President Trump, and they are still holding out for someone ‘better.’ Therefore, it would be inappropriate to schedule things with H…