Republicans overwhelmingly support constructing the pipeline. Eight-in-ten conservative Republicans (84%) and 76% of GOP moderates and liberals favor building the pipeline. As was the case in March, Democrats are internally divided: By 58% to 41%, conservative and moderate Democrats favor construction of the pipeline.Liberal Democrats oppose the proposal, by 54% to 41%. While majorities across all age groups back the Keystone XL pipeline, there is less support among young people.s was the case in March, Democrats are internally divided: By 58% to 41%, conservative and moderate Democrats favor construction of the pipeline. Liberal Democrats oppose the proposal, by 54% to 41%. While majorities across all age groups back the Keystone XL pipeline, there is less support among young people.