Nearly 70 percent of Americans, including a majority of Republicans, want the United States to take “aggressive” action to combat climate change – but only a third would support an extra tax of $100 a year to help, according to a Reuters/Ipsos poll released Wednesday.

The results underscore a crucial challenge for Democrats seeking to unseat President Donald Trump in next year’s election. Many will have to balance their calls for strict environmental regulation with a convincing argument for why the changes are good for taxpayers and the economy.

“There isn’t any doubt climate change has emerged as an important issue in this election,” said G. Terry Madonna, Director of the Center for Politics and Public Affairs at Franklin and Marshall College. “But when it comes to how you will pay for it, that’s what can make a big difference.”