tug of war

“For far too long, we’ve changed our clocks in pursuit of daylight, while incurring public health and safety risks in the process. Committing to standard time has health benefits and allows us to end the biannual tug of war between our biological and alarm clocks,” said Dr. Alexander Ding, a trustee with the American Medical Assn., in a statement.

Newsom energy package sparks tug of war in final hours of California legislative session.

"Basically, there is a tug of war between tumor and immune cells," Curtis said.

Locked in a gravitational "tug of war" among Jupiter, Europa and Ganymede, Io is constantly being squeezed, leading to frictional heat buildup in its interior -- believed to be the cause for its sustained and widespread volcanic activity.

“Our president has little respect for the law. He’s in a sort of tug of war for power and he does what he wants,” said Claudia Aguilar, a lawyer at Mexico’s Free School of Law.