"If her audience finds out that Putin is a thief, then so much the better," said Dmitry Gudkov, a well-known Kremlin critic. "The question is, will she want to say this?"
Ksenia Sobchak challenges Vladimir Putin for Russia president →
"On the one hand, this campaign has been aimed at the opposition, but on the other hand it has been addressed to the president," said Dmitry Gudkov, an opposition lawmaker.
Chechen leader threatens foes in bid to gain Putin's support →