Russian President Vladimir Putin delivers a speech in Moscow's Red Square last May. Russian-backed efforts attempting to interfere in U.S. politics appear to be evolving.
Yuri Kochetkov/AFP/Getty Images
In September, President Trump meets with British Prime Minister Theresa May, who says the group whose videos Trump retweeted this week "seeks to divide communities through their use of hateful narratives that stoke tensions."
With examples of Russian-created Facebook pages behind him, Sen. Patrick Leahy, D-Vt., questions witnesses from social media companies during a hearing on Capitol Hill.
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Protesters gather outside as Roy Moore, Republican candidate for U.S. Senate, appears at a mid-Alabama Republican Club's Veterans Day event in Vestavia Hills, Ala., on Saturday.
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This April 3 photo, taken in Washington, DC, shows President Donald Trump's Twitter feed. Some Twitter users argue Trump is violating the First Amendment by blocking people from his feed after they posted negative comments.
J. David Ake/AP
It has become increasingly common for politicians at all levels of government to block followers, whether it's for uncivil behavior or merely for expressing a different point of view.