Another exciting possibility: The pathway HIV usurps seems to be important for other viruses as well.

FORBES: Magazine Article

So strong was the effect on the reefs that the researchers believe it usurps other factors, said lead author Lester Kwiatkowski.

BBC: Particles from fossil fuels 'affect the growth of corals'

This year, the iPhone usurps its cousin and predecessor.

FORBES: Emotionally Attached To Your iPhone? You're Not Alone

That being the case, as long as the Fed usurps the role of markets in an attempt to set the proper price for credit, its rate machinations will make capital difficult to access.

FORBES: Political Economy

The Obama administration's shift last month on the politically volatile issue of immigration policy prompted immediate praise from Latino leaders who have criticized Congress and the White House for inaction, while Republicans reacted with outrage, saying the move amounts to amnesty and usurps congressional authority.

CNN: Young immigrants prepare for new U.S. deportation policy