Those who are struggling say the game has become tougher over the past 15 years.

On the Senate floor, a bill to overhaul accounting procedures was becoming tougher by the hour.

Yet if the border has become tougher, so, too, have migrants.

It is good that the judicial system has become tougher on white-collar crime.

The world has become bigger and tougher, particularly for gymnasts.

Controllers are happy with the pay increases but say that management has become tougher.

Things have become a lot tougher, say the believers in managed security services.

Within months, fellow coaches noticed that life had just become tougher.

With more newspapers being started, the competition is becoming tougher.

Competition in the growing midsize class has become a lot tougher.