Gabrovski's political career took off in October 1939 when he was brought into the cabinet of
Georgi Kyoseivanov as minister responsible for the railways, with his appointment to the cabinet seeing him resigning from the Ratnitsi. In the cabinet established by
Bogdan Filov in 1940 he was promoted to the post of
Minister of the Interior. The appointment had been made by
King Boris III as an attempt to demonstrate to the Nazis that Bulgaria was largely favourable towards them. In this role Gabrovski was quick to enact laws limiting the role of
Jews in Bulgarian life and expelled several hundred recently arrived Jews, who had hoped to gain entry into
Mandatory Palestine from Bulgaria, forcing them to go to
Turkey instead. Gabrovski also sent
Alexander Belev, a fellow lawyer and Ratnik whom he appointed to a post in the ministry, to
Nazi Germany to make a study of their
racial laws. He subsequently became associated with the deportation of Jews to
extermination camps and most notoriously signed a written agreement to approve the
deportation of 11,343 Jews from Macedonia and Thrace on 22 February 1943. As 12,00 of these Tracian and Macedonian Jews had been denied Bulgarian citizenship because of Bulgarian anti-Jewish legislation following the Nazi and Bulgarian occupation of Thrace and Macedonia, Gabrovski told German ambassador
Adolf Beckerle that their deportation to Treblinka would be a much simpler matter than any similar attempts against those Jews with citizenship. The plan, as developed by Gabrovski and Belev under the authoritarian, pro-fascist leadership of King Boris III, was partially completed, with 11,363 Tracian and Macedonian Jews deported to
Treblinka extermination camp. All but 12 of those deported were exterminated there. As news spread about the deportation, Bulgarian Jews lead an intensive campaign to stop the second scheduled deportation of the 48,000 Bulgarian Jews to Treblinka that King Boris had originally agreed to. The campaign succeeded in forcing King Boris to delay the deportation agreement with Germany. King Boris never cancelled the agreement, which was only the "first" deportation planned. ==Fall from power==