Why have we heard so little about this national problem?

We cannot simply dump our major national problems on the states.

He said it might not be simply a national problem.

"This is a national problem, and we've never played by those rules before."

But this is a national problem, for which no one has yet found a cure.

The education authority say they've tried everything and it's a national problem.

But many see it as a national problem, not a regional one.

In that case, the matter turns out to be a national problem after all.

Yet many people feel that poor public schools are a national problem.

After 1832, his perception of the national problems became different.