Six senators, led by Republican John McCain of Arizona, say a tougher, more comprehensive military detention policy is necessary to fill the void created by two years of what they call the Obama administration's inconsistent approach.

The lawmakers proposed legislation Thursday that would keep open the military prison at Guantanamo Bay, Cuba; impose restrictions on transferring detainees to foreign countries, and push for military commissions, not civilian trials, for detainees.

President Barack Obama announced Monday the resumption of military trials after a two-year halt. The administration reiterated its desire to close the military prison in Cuba.

Joining McCain were independent Sen. Joe Lieberman of Connecticut and four Republicans — Lindsey Graham of South Carolina, Scott Brown of Massachusetts, Kelly Ayotte of New Hampshire and Saxby Chambliss of Georgia.