The country will go to the polls in December to elect the State Duma, parliament's lower chamber, and will hold presidential elections in March.
Vladimir Putin told a news conference after the summit of the Group of Eight top industrialized nations: "We will not tolerate any attempts to interfere and support any political forces in the Russian Federation ahead of major political events, or to back any forces inside Russia that some would like to use to pursue their personal interests in Russia."
Following a string of 'color revolutions' in former Soviet republics in recent years, the Russian government has taken measures to prevent foreign influence on political forces within the country.
A move to prohibit nongovernmental organizations, deemed serious players in such revolutions, from receiving foreign funds for political purposes, was widely seen as such a measure, and was branded in the West as a clampdown on democracy.
The president stressed that the elections would be held in compliance with democratic principles and the law.
"I am sure that everything will be done within the boundaries of democratic procedures. Everyone will have the right to express their opinions on the current authorities, but they will act in compliance with the law," Putin said. "I do not violate the Constitution and will not let anyone else do so."
There has been broad speculation about Putin's possible reelection for a third term, considering his high popularity ratings and the lack of a clear presidential successor. But the president has repeatedly denied any possibility of running for a third term, saying he would never violate the Constitution, while some forces even lobbied for amending the document.
When asked whether he will run for presidency at the elections after next, in 2012, the Russian leader said he was not considering this.
"I still have a lot of time. Hypothetically, this is possible, hypothetically. The Constitution does not prohibit this," Putin said. "But this is a long period. I am not even thinking about it."
