In a
column in the
New York Times, conservative columnist Ross Douthat gives the best, most concise explanation for how voters can support Donald Trump despite his "low character, his penchant for inflaming racial tensions, his personal corruptions," his "zest for self-sabotage, his wild swings, his inability to delegate or take advice," his seeming to be "gross and seedy and bigoted," even his "wretchedly stupid conduct since the first debate."
The key to Douthat's explanation is that there are different reasons for different factions supporting Trump. It's this coalition that gives Trump his shot at winning the White House.