The Obama administration's initial efforts to keep ground troops out of Iraq and Syria are becoming increasingly unpopular with the American public. A new CBS poll found that 65% of Americans see ISIS as a "major threat" (up 7 points since October) and a majority 57% now believe that it is necessary to send U.S. ground troops into Iraq and Syria.

Amid more executions by the militant group ISIS, Americans increasingly see the group as a threat to the U.S. Now, 65 percent of Americans view ISIS as a major threat - up from 58 percent in October - while another 18 percent view it as a minor threat. Majorities of Republicans (86 percent), Democrats (61 percent) and independents (57 percent) view ISIS as a major threat.

With concern about ISIS growing, support for the use of U.S. ground troops in the fight against ISIS has risen. For the first time, a majority of Americans (57 percent) favor the U.S. sending ground troops into Iraq and Syria to fight ISIS. In October, Americans were divided (47 percent favored and 46 percent opposed), and in September these numbers were reversed (39 percent favored and 55 percent opposed).

CBS notes that support for ground troops has risen across the board, but "particularly among Democrats and independents" since October, when 56% of Democrats and 49% of independents disapproved of sending ground troops into the region. 50% of Democrats approve and 53% of independents currently approve of the strategy.

The poll also found that two-thirds of Americans approve of the president's request for military authorization to employ ground troops over the next three years for limited operations, but would "preclude the use of ground troops for long term offensive operations."