Nigeria: Former governor of Kaduna (1977-78) Muktar Muhammed dies.
San Marino: Matteo Fiorini (Future Republic) and Enrico Carattoni (Democratic Socialist Left) take office as captains-regent.
Canada: Julie Payette is sworn in as governor general.
India: B.D. Mishra is sworn in as governor of Arunachal Pradesh.
Iraq: Former president of the Governing Council (2003) and president (2005-14) Jalal Talabani dies.
Italy: Former president of Sicilia (1993-95) Francesco Martino dies.
The Netherlands: Defense Minister Jeanine Hennis-Plasschaert resigns. On October 4 Klaas Dijkhoff is appointed as defense minister.
Russia: President Vladimir Putin accepts the resignation of the head of the republic of Dagestan, Ramazan Abdulatipov, and appoints Vladimir Vasilyev as acting head of the republic.
United States: In mayoral elections in Albuquerque, Tim Keller wins 39.3% of the vote, Dan Lewis 22.9%, and Brian Colón 16.4%. A runoff will take place on November 14.
Brazil: Amazonino Armando Mendes takes office as governor of Amazonas.
Congo (Kinshasa): The provincial assembly of Kasaï Central passes a no-confidence motion (17-4) against the governor, Alex Kande Mupompa.
India: Satya Pal Malik is sworn in as governor of Bihar.
Ireland: Former foreign minister (1954-57) and prime minister (1973-77) Liam Cosgrave dies.
Mongolia: Parliament approves Ukhnaa Khürelsükh as prime minister (47-0). On October 11 the ruling party nominates Damdin Tsogtbaatar as foreign minister, Nyamaa Enkhbold as defense minister, Tsendiyn Nyamdorj as home affairs minister, and Chimed Khürelbaatar as finance minister. On October 17 President Khaltmaa Battulga approves the nominations with the exception of Khürelbaatar. On October 18, however, parliament confirms all of the above.
Russia: President Vladimir Putin accepts the resignation of the governor of Primorsky kray, Vladimir Miklushevsky, and appoints Andrey Tarasenko as acting governor.
Congo (Kinshasa): Michel Balabala Kasongo takes office as governor of Kwilu.
India: Ganga Prasad is sworn in as governor of Meghalaya.
Russia: President Vladimir Putin accepts the resignation of the governor of Oryol oblast, Vadim Potomsky, and appoints Andrey Klychkov as acting governor.
India: Banwarilal Purohit is sworn in as governor of Tamil Nadu.
Russia: President Vladimir Putin accepts the resignation of the governor of Novosibirsk oblast, Vladimir Gorodetsky, and appoints Andrey Travnikov as acting governor.
Argentina: In gubernatorial elections in Corrientes, Gustavo Valdés (Encuentro por Corrientes-Cambiemos, including Radical Civic Union) wins 54.1% of the vote and Carlos Espínola (Frente Corrientes Podemos Más, including Justicialist Party) 45.2%.
India: Devendra Kumar Joshi is sworn in as lieutenant governor of the Andaman and Nicobar Islands.
Congo (Kinshasa): Constant Lomata Kongoli takes office as governor of Tshopo.
El Salvador: Former president (1994-99) Armando Calderón Sol dies.
Russia: President Vladimir Putin accepts the resignation of the governor of Omsk oblast, Viktor Nazarov, and appoints Aleksandr Burkov as acting governor.
Zimbabwe: In a cabinet reshuffle, Walter Mzembi becomes foreign minister, Obert Mpofu home affairs minister, and Ignatius Chombo finance minister.
Canada: Danny Breen is sworn in as mayor of Saint John's.
Guadeloupe: Former prefect (1994-96) Michel Diefenbacher dies.
India: Jagdish Mukhi is sworn in as governor of Assam.
Liberia: In the first round of presidential elections, George Weah wins about 39% of the vote, Joseph Boakai about 29%, Charles Brumskine about 10%, Alexander Cummings about 7%, and Prince Johnson about 7%. Turnout is about 75%. A runoff is to be held on November 7.
Russia: President Vladimir Putin accepts the resignation of the governor of Ivanovo oblast, Pavel Konkov, and appoints Stanislav Voskresensky as acting governor.
Barbados: Former governor-general (1996-2011) Sir Clifford Husbands dies.
United States: President Donald Trump nominates Kirstjen Nielsen as homeland security secretary.
Aruba: Evelyn Wever-Croes is named formateur of a new government.
The Netherlands: Prime Minister Mark Rutte is asked to form a new government. On October 20 the complete government is announced, including Halbe Zijlstra as foreign minister, Ank Bijleveld as defense minister, Kajsa Ollongren as interior minister, and Wopke Hoekstra as finance minister.
Russia: President Vladimir Putin accepts the resignation of the governor of Pskov oblast, Andrey Turchak, and appoints Mikhail Vedernikov as acting governor.
Somalia: Defense Minister Abdirashid Abdullahi Mohamed resigns.
Madagascar: Former president (1993-96) Albert Zafy dies.
Peru: The government of Prime Minister Mercedes Aráoz wins a confidence vote in parliament (83-17).
Serbia: Former president of the Executive Council (1986-89) Desimir Jevtic dies.
Solomon Islands: In a cabinet reshuffle, John Maneniaru becomes finance minister.
Congo (Kinshasa): The provincial assembly of Mongala passes a no-confidence motion against the governor, Bienvenu Essimba Baluwa Bolea.
Russia: Andrey Nikitin is inaugurated as governor of Novgorod oblast.
Austria: In parliamentary elections, the Austrian People's Party wins 31.5% of the vote (62 of 183 seats), the Social Democratic Party 26.9% (52), the Freedom Party 26% (51), New Austria 5.3% (10), List Pilz 4.4% (8), and the Greens 3.8% (0). Turnout is 80%. On October 20 President Alexander Van der Bellen tasks People's Party leader Sebastian Kurz with forming a government.
Germany: In state elections in Niedersachsen, the Social Democratic Party wins 36.9% of the vote (55 of 137 seats), the Christian Democratic Union 33.6% (50), the Greens 8.7% (12), the Free Democratic Party 7.5% (11), the Alternative for Germany 6.2% (9), and the Left 4.6% (0). Turnout is 63.1%.
Kyrgyzstan: In presidential elections, Sooronbay Jeenbekov wins about 54% of the vote, Omurbek Babanov about 33%, and Adakhan Madumarov about 6%. Turnout is about 56%.
Mexico: Former interim governor of San Luis Potosí (1991-92) Gonzalo Martínez Corbalá dies.
Canada: In mayoral elections in Calgary, incumbent Naheed Nenshi wins 51.4% of the vote and Bill Smith 43.7%; turnout is 58.1%. In Edmonton, incumbent Don Iveson wins 72.5% of the vote and his nearest opponent Don Koziak 6.8%; turnout is 31.5%.
Indonesia: Anies Baswedan is sworn in as governor of Jakarta.
South Africa: In a cabinet reshuffle, Ayanda Dlodlo becomes home affairs minister.
Portugal: Interior Minister Constança Urbano de Sousa resigns. Eduardo Cabrita is named as new interior minister, effective October 21.
Canada: Antoinette Perry is sworn in as lieutenant governor of Prince Edward Island.
Norway: In a cabinet reshuffle, Ine Marie Eriksen Søreide becomes foreign minister and Frank Bakke-Jensen defense minister.