That is a fact. But the GOP began to cast aside it's conservation legacy back in the 80's with Reagan and his appointment of James Watt as Interior secretary. Just as Nixon decided to embrace the segregationist Dixiecrats that had left the Democratic party, Reagan embraced the so-called "sagebrush rebellion" that opposed many of the conservation policies that had previously been supported by the GOP. The result is that today's GOP has repudiated and jettisoned the conservation legacy of Theodore Roosevelt.