Well he apparently is bolstering that claim by being seen by fewer people. While the DNC convention is underway in Chicago, Trump has chosen to grace the town of Howell Michigan with his presence. Howell, population 10,000 or so. Now, some media outlets have pointed out that the town has some lingering white supremacist/klan sympathies, but that's a lot of small towns in rural Michigan. The real issue here is that he's not exactly burning up the major markets. He's been on a kick of small events in towns/states where he's got things locked up for the most part, with the only "rally" coming up Friday in Glendale Arizona. It will be interesting to see if he can pack that arena with enthusiastic fans like Harris did, but still...
Is he tired? Lazy. Afraid to go out in front of large crowds since getting nicked by a bullet?