How was Vladimir Nabokov’s father involved in Russian politics?

Vladimir Nabokov’s father, V.D. Nabokov, was a prominent figure in pre-Revolutionary Russian politics. He served as a leader of the Constitutional Democratic Party (known as the Kadets), a liberal political organization.1

In addition to his active political leadership, he was a prolific author who wrote numerous books and articles concerning criminal law and politics. Notably, he authored The Provisional Government (1922), which remains a primary historical source regarding the downfall of the Kerensky regime. After the family emigrated to Berlin, he was assassinated in 1922 by a reactionary rightist while attempting to shield another individual at a public meeting.1