WASHINGTON (MCT) — For Mitt Romney, making a comeback in the race for president will require changing the minds of voters like Barry Hubscher, Cathleen Kimmel and Michael Gray.

All three had considered voting for the Republican nominee as recently as August, but lately they have found themselves leaning toward President Barack Obama. Listening to them and others like them helps explain the shift in polls toward Obama since the Democratic convention and illustrates the magnitude of the task that lies before Romney as he tries to catch up in an increasingly challenging race.