ATLANTA — Gov. Nathan Deal could deal another major blow to conservatives in the Republican-dominated Legislature as lawmakers await his decision on another controversial piece of legislation: a bill to allow college and university students ages 21 and up to carry a concealed handgun on campus with a permit. Rep. Buzz Brockway, a Republican from Lawrenceville, co-sponsored the bill, but said he did not want to predict which way the governor would lean. Brockway also said he did not think the veto of the religious exemption bill earlier this week would weigh into Deal’s decision. “I don’t think folks like retribution, or revenge in politics, so if he chooses to disagree, we will just roll up our sleeves and work harder,” he said. Brockway cited Deal’s strong relationship with the Legislature, saying that even if the bill is vetoed, he does not see how it would have any impact on Deal’s support from Republican lawmakers. House Minority Leader Stacey Abrams said she could not speculate on a reaction from Deal’s supporters on the right, but said the core group that lobbied for the bill would be impacted.