Sentence examples for challenge has escalated from inspiring English sources

The challenge has escalated.

What started as a local insurgency over autonomy has escalated into a challenge to the Egyptian state and its leader, with implications for neighboring Israel and the Palestinian Authority, to the east; chaotic Libya, to the west; and Europe, to the north.

Since Mr. Morsi's decree temporarily suspending the power of the courts to challenge his decisions, violence around the country has escalated sharply.

As the challenge by the protesters, known as the Red Shirts, has escalated, the allegiance of the military has become a subject of discussion among political analysts.

Malnutrition has escalated.

It has escalated.

But the problem has escalated.

The feud has escalated in recent months.

Acrimony has escalated in recent weeks.

Since then, tension has escalated.

The war has escalated in recent weeks.