It would appear that the Republican youth and young adults are buying into climate change in a big way. Could it be that they feel they have an interest in the issue that their elders do not? As in, they are going to be around to deal with the consequences? Climate Could Be an Electoral Time Bomb, Republican Strategists Fear When election time comes next year, Will Galloway, a student and Republican youth leader at Clemson University, will look for candidates who are strong on the mainstream conservative causes he cares about most, including gun rights and opposing abortion. But there is another issue high on his list of urgent concerns that is not on his party’s agenda: climate change. “Climate change isn’t going to discriminate between red states and blue states, so red-state actors have to start engaging on these issues,” said Mr. Galloway, 19, who is heading into his sophomore year and is chairman of the South Carolina Federation of College Republicans. “But we haven’t been. We’ve completely ceded them to the left.” Nearly 60 percent of Republicans between the ages of 23 and 38 say that climate change is having an effect on the United States, and 36 percent believe humans are the cause. That’s about double the numbers of Republicans over age 52. But younger generations are also now outvoting their elders. According to a Pew Research Center analysis, voters under the age of 53 cast 62.5 million votes in the 2018 midterm elections. Those 53 and older, by contrast, were responsible for 60.1 million votes. “Americans believe climate change is real, and that number goes up every single month,” Frank Luntz, a veteran Republican strategist, told a Congressional panel recently. He also circulated a memo to congressional Republicans in June warning that climate change was “a G.O.P. vulnerability and a G.O.P. opportunity.” A new Harvard University survey of voters under the age of 30 found that 73 percent of respondents disapproved of Mr. Trump’s approach to climate change (about the same proportion as those who object to his handling of race relations). Half the respondents identified as Republican or independent. “Here’s another gap between our party and younger voters,” said a recent report by a Republican polling firm, Public Opinion Strategies. Speaking of younger Republicans, the firm concluded that “climate change is their most important issue” and called the numbers “concerning” for the party’s future.