I'm worried that Trump will crash and flame out too soon.Hope he lasts until at least the convention

[hill2016]

Or maybe he was just trolling the GOP all along and was never serious about running

[TheCowsCameHome]

1. He MUST hang in there, at least untill fall,

....assuming he makes it past the GOP convention.

He is too precious of a gift to throw away too soon.

[tecelote]

2. I believe he was serious but I do not think he is going to make it to the convention.

We're going to expend all our ammunition against him then Romney (or someone else) will sweep in as the sane choice.

Boom. The game changes.

[ChiciB1]

3. Well, Then Some People Won't HAVE To FALL On Their Sword...

Problem solved!

[KingFlorez]

4. He's too arrogant to drop out

And if there is any move to replace him at the convention, it will only result in a huge commotion on the floor that will damage the GOP even more. He's the nominee and that won't change.