Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Moscow (CNN) -- President Dmitry Medvedev has signed an order dismissing longtime Finance Minister Alexei Kudrin, the Kremlin reported Monday on its website. The state-run RIA-Novosti news agency said Kudrin had resigned amid a dispute with Medvedev. The announcement came shortly after Medvedev had given Kudrin until the end of the day to decide whether to quit. "You need to make a decision quickly and tell me about it today," Medvedev told Kudrin during a session of the modernization commission in Dimitrovgrad. Medvedev urged that Kudrin to "make up his mind about his political future," according to the non-governmental, Moscow-based Interfax news agency.Russian Finance Minister Kudrin steps down over differences with MedvedevMedvedev has already signed the order dismissing KurdinThe economist has been credited with helping Russia weather the global downturn 
 Question:Citing differences with _, particularly related to defense spending, Kudrin said that he would not remain in a government led by Medvedev, Interfax said.

Dmitry Medvedev