How was Theodore Roosevelt a progressive president?

Roosevelt was a leader of the Progressive movement, and he championed his " Square Deal " domestic policies, promising the average citizen fairness, breaking of trusts, regulation of railroads, and pure food and drugs. He made conservation a top priority and established many new national parks, forests.. etc

roosevelt, a progressive reformer, earned a reputation as a "trust buster" through his regulatory reforms and anti-trust prosecutions. his "square deal" included regulation of railroad rates and pure foods and drugs; he saw it as a fair deal for both the average citizen and the businessmen.