“There’s limited evidence that campaign appearances by surrogates really matter all that much,” Geoffrey Skelley, an associate editor and political analyst at Sabato’s Crystal Ball, the UVA Center for Politics’ nonpartisan political handicapping newsletter, said. But Skelley said if Trump did campaign for Republicans, it should be in places where he’s popular. Nevada is not one of those places, according to a poll from Morning Consult, which found back in August that 46 percednt of voters approve of the job Trump is doing.