The borders will be closed during the voting hours, officials said, to prevent candidates from paying foreigners to vote illegally.

More precisely, he wants to prevent candidates spending Lord Ashcroft's money.

Such design originally prevented candidates from guessing an answer they did not know, but that would also be very dangerous in some confusing questions.

The size of the initial regional primary may be large enough to prevent less-funded candidates from being able to compete.

This would prevent candidates from "camping out" in early primary states.

With the new rules, the producers hope to increase the excitement and to prevent good candidates from being knocked out too early.

The law prevented candidates from running in the primaries of parties with which they were not affiliated.

He asserts that this project prevents candidates from addressing newspaper readers on other important issues.

The Liberal Democrat leadership had no mechanism to prevent candidates standing.

These set limits to the level of contributions with the aim to prevent candidates from becoming obligated to special interest groups.