Going to be frank, Gephardt if he ran would be one of the few viable Democratic candidates to beat Trump. Gephardt would win most of the Rust Belt (including Iowa and Ohio by narrow margins) Trump does better in certain areas than he did in real life and wins NV and NH. Gephardt makes his home state of Missouri as well as Indiana competitive but Trump still wins narrowly in both states.
293-
245Closest states:Nevada, 0.21%Missouri, 0.74%NE-02, 0.85%Iowa, 1.26%Ohio, 1.32% (tipping point state)
New Hampshire, 2.03%Wisconsin, 2.84%Indiana, 3.26%Virginia, 3.65%Pennsylvania, 3.81%Colorado, 3.92%Florida, 4.16%Michigan, 4.23%Maine, 4.52%Minnesota, 4.95%