Final answer:
Reagan's most articulate support for president came from conservative groups who wanted to restore American stature in the world. They included conservative think tanks like the Heritage Foundation.
Step-by-step explanation:
Reagan's most articulate support for president came from conservative groups, who feared that the United States was losing its position in the world and wanted to restore American stature. These groups included conservative think tanks like the Heritage Foundation, which shaped American political and social dialogues based on conservative principles. Reagan's popularity and effectiveness as a leader drew from his reputation as a man who fought for conservative ideas.