WASHINGTON — Conservative podcaster Michael Knowles will recall facing down hundreds of pro-transgender protesters who forced him to cut a 2023 appearance at the University of Pittsburgh short when he testifies before a Senate panel Tuesday on rising “ leftist terrorism .” The outspoken culture warrior had come to the Pennsylvania campus to debate transgenderism, but was greeted by lefty agitators hurling smoke bombs at police barricades — blocking roads and forcing nearby buildings into a “