Superpresidential

… after President Boris Yeltsin dissolved parliament in September 1993 and won a referencum on a new constitution that eliminated the previous sustem of checks and balances in favor of a new superpresidential order.

Source: wiktionary

The superpresidential regime is therefore not stable; it can drift in any direction—changing its rhetoric, its goals, its balance of forces, and its major ideas.

Source: wiktionary

The 1993 Russian Constitution is frequently described as “superpresidential” because of the considerable powers it gave to the head of state.

Source: wiktionary