With Democratic presidential candidate Hillary Clinton as his first guest, Jimmy Fallon bagged his best Monday Tonight Show rating in five months in metered-market households (2.8). Clinton’s latest appearance on the late-night show, the week after GOP rival Donald Trump stopped by, also delivered Tonight’s highest Monday adults 18-49 rating in the Local People Meters in four months, and equaled its best Monday in the demo in seven months. Anticipating your question…