Washington( CNN) Secretary of State nominee Rex Tillerson endured a rocky cross-examination Wednesday on the perennial question of how to balance America's national security interests with its advocacy for human rights.

Tillerson faced a grilling from Republican Sen. Marco Rubio, who represents a vital vote in the narrowly-split Senate and could have outsized influence on whether Donald Trump's pick to be the top US diplomat is confirmed.


Rex Tillerson perfects the non-answer