There's been a rash of conspiracy theories about secret concessions that Russian President Vladimir Putin is supposed to have made to Western leaders. The latest asserts that Putin could have helped Greece exit the euro but reversed course at the last moment, thus pushing Greek Prime Minister Alexis Tsipras into the cold embrace of European Union leaders.

The Greek newspaper To Vima reported earlier this week that Tsipras had asked Putin for a $10 billion loan so that Greece could transition back to the drachma. If it reintroduced the national currency, it would need foreign reserves to back it up, and Greece was out of euros. According to the report, Russia floated the idea of a $5 billion advance on the construction of a gas pipeline through Greece, a branch of the Turkish Stream project that Russia and Greece agreed to build in June.

To Vima is a reputable newspaper with good political sources, so 17 legislators from the opposition New Democracy party have officially asked Tsipras whether the report was true. The prime minister probably will deny it, as the Kremlin did Wednesday. Putin's press secretary, Dmitri Peskov, told the news agency Interfax that "the Greek leadership never asked Russia for help."