which parties have been present in the state duma?
russian social democratic party, socialist-revolutionary party, labour group, progressist party, constitutional democratic party (kadets), non-russian national groups, centre party, octobrist party, nationalists, rightists
which ones have held seats in all the dumas?
russian social democratic party, labour group, progressist party, constitutional democratic party (kadets), octobrist party, nationalists, rightists
of these, which one held the most seats in the first duma?
constitutional democratic party (kadets)