The law was drafted after a controversial case in the wake of the Ukraine crisis.
Alexey Navalny has announced his Party of Progress will not run alongside the Parnas party.
The Kursk local politician could face two years in jail after a public act of defiance.
Sergey Naryshkin said the fear of Russia in the Baltics is ingrained.
The T-shirts did not show the disputed region as part of Russia.
The Ukraine conflict can be resolved in a day, Mikhail Kasyanov said.
Kremlin spokesman Dmitry Peskov said that Moscow would move to protect its interests
The law is to be passed 'in the very near future' according to a defence official.
An extraordinary letter, addressed to major European bodies, compares the Ukraine crisis to WW2.
Russian MPs call for Germany to "remember history" when imposing EU sanctions.