For his times, TR was quite the liberal. In fact, he was a card-carrying Progressive.

The party’s platform built on Roosevelt’s Square Deal domestic program and called for several progressive reforms. The platform asserted that “to dissolve the unholy alliance between corrupt business and corrupt politics is the first task of the statesmanship of the day”. Proposals on the platform included restrictions on campaign finance contributions, a reduction of the tariff and the establishment of a social insurance system, an eight-hour workday and women’s suffrage.

en.wikipedia.org