With everyone from the Obama campaign to Pat Boone trying to mobilize voters, the fight over collective bargaining in Ohio — or at least this round of it — is at its climax.

On Tuesday, voters across the state will head to the polls to cast judgment on Issue 2, the ballot measure for the Republican-backed limits to collective bargaining for about 360,000 public employees introduced through Senate Bill 5. Polling places across the state will be open from 6:30 a.m. to 7:30 p.m.

While two other statewide issues also are before voters this year — one that would raise the mandatory retirement age for Ohio judges from 70 to 76 and another, more-controversial measure related to mandatory participation in health-care programs in Ohio — Issue 2 unquestionably has captured the most attention in this off-year election. Many national politicos and pundits are watching the Ohio results to see if the GOP drive to trim public unions continues or hits a wall.