I did read somewhere that he has majority supporters... That was before all his racist remarks though.
Yes, for a while, Trump had the majority of potential voters, though it went back and forth between him and Ben Carson. Right now, he's still at the top for the Republican Party, though that has decreased based on his comments the last few days/weeks.
He's went back and forth with his remarks, initially starting out by saying he 'loves Muslims and works well with them', to saying he outright hates them and wants to ban them from the United States. His campaign works with the flow of the present world we live in. I wouldn't be surprised if by January or February, he'll go and say something completely different.
Trump is hated by so many people I seriously couldn't imagine him even getting a chance of being president, he is a constant joke.
Sadly, there is a chance. There are so many uninformed voters, or otherwise racist, homophobic, and sexist voters in the US, that it is very possible. Though, it's still very early and we still have to get through the primaries to even see who will be running for the Republican Party. The Democratic side of the elections, from my view, aren't really making any headway right now, but who knows.