Donald Trump appears to be “laying the groundwork” to pull out of the September 10 debate with his Democratic presidential opponent, Vice President Kamala Harris, after posting a late Sunday night rant attacking the network scheduled to host it. Behind the scenes, the Trump campaign reportedly is refusing a simple Harris campaign request: keep the mics on. “So definitely looks like Trump is laying the groundwork to pull out of the ABC News debate,” noted Zeteo News media columnist Justin Baragona, after Trump asked, “why would I do the Debate against Kamala Harris on that network?” “I watched …