The Europeans could and did colonize virtually unchallenged in some areas.

But these calls for transparency have yet to penetrate to the individual doctor's office, still a black box where conflicts of interest go virtually unchallenged.

Indeed, Japan's economic embrace of this region has gone virtually unchallenged.

The bias of campus spending on left-wing guests has been virtually unchallenged.

At the time, it seemed like an outlandish statement because his record had gone virtually unchallenged for almost two decades.

Trimbole seemed to go about his illegal activities virtually unchallenged.

The fact is, in years gone by its policy-making role was virtually unchallenged.

American car manufacturers were virtually unchallenged in the world, and one of the major problems facing the city was a housing shortage.

Ottoman suzerainty remained virtually unchallenged throughout the following 90 years.

The problem with this idea, which goes virtually unchallenged in Washington, is that it simply trades one caricature for another.