But she said his main hurdle would be cementing policies not fully developed.

Paradoxically, but not unexpectedly, a main hurdle for the Brown campaign is money.

As before, one of the main hurdles was engine selection.

But the cost of the land itself was the main hurdle.

The main hurdle, as he sees it, is cultural rather than technological.

Perhaps the main hurdle for the field is not technical but financial.

If Kylie is happy with her work, she considers she's over the main hurdle.

But financing for a fresh bid remains the main hurdle.

One of the main hurdles has been delivering the agents specifically to the cells in which they are needed.

Many vision experts say the eye's impaired ability to see contrast under low light conditions is the main hurdle for night driving.