Igor Fruman and Lev Parnas are charged with conspiring to violate bans on straw donor and foreign donor contributions to U.S. political campaigns.
The Russian leader said Moscow should listen to opponents but only "patriotic" ones.
Mikhail Kasyanov claimed parliamentary vote was illegitimate.
Two days before polling day, Konstantin Yankauskas has lost access to email and social media.
The late Boris Nemtsov's party participated in a televised debate ahead of the September elections.
Alexey Navalny has announced his Party of Progress will not run alongside the Parnas party.
Alvi Karimov has asked Russian investigators and prosecutors to act against Ilya Yashin.
Kadyrov's spokesman claims the Russian opposition does not get his humor.
Boris Nemtsov ally Kasyanov had a tasty surprise during dinner in Moscow.
Mikhail Kasyanov has called it a "direct threat" and reported the video to the police.
A full interview with Alexander Bastrykin is to be published this week.