He was the chief obstacle to my plans.

He called Mr. Clinton the "rear guard of the welfare state" and the "chief obstacle" to a balanced budget.

He is the chief obstacle to a balanced budget and the balanced budget amendment.

Coatsworth rejects those arguments and says the chief obstacles were poor transportation and inefficient economic organization.

That is the "chief present obstacle to a better understanding of the physical world," Maddox says.

Cost is the chief obstacle.

It was Gibson's own fault, and was the chief obstacle to their complete understanding.

John's failure to do so was the chief obstacle to the fulfillment of Jesus' mission.

The philosophes used reason to attack superstition, bigotry, and religious fanaticism, which they considered the chief obstacles to free thought and social reform.

And this, I discovered, is the chief obstacle to sexual self-help.