The Republican US presidential candidate Donald Trump and his Democratic opponent, Vice President Kamala Harris, are engaged in a tussle over their televised debate. Trump announced late Friday on his online platform Truth Social that he had single-handedly settled on a debate to be aired by the Republican-friendly channel Fox News on September 4. Harris replied on Saturday that Trump was trying to wiggle out of a previously agreed debate set for September 10 on the traditional broadcast network ABC. Trump and President Joe Biden had originally planned on having two TV debates, the second of w…