President-elect Donald Trump speaks during the presidential inaugural Chairman's Global Dinner, Tuesday, Jan. 17, 2017, in Washington. Evan Vucci AP
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For months, Trump has voiced positive sentiments toward Putin. In early January, he tweeted that “only ‘stupid’ people, or fools” would think it’s bad to have good relations with Russia.

“When I am President, Russia will respect us far more than they do now and both countries will, perhaps, work together to solve some of the many great and pressing problems and issues of the WORLD!” he tweeted last week.

During the campaign in July, he displayed ignorance that Russian-backed separatists had invaded Crimea in eastern Ukraine in 2014 and he called on Russia to hack away to uncover thousands of emails that Clinton had never made public after using a private server while secretary of state from 2009 to 2013.

At the Republican National Convention in Cleveland last July, Trump’s campaign associates successfully changed the Republican Party’s platform to weaken a provision advocating more military support for the Ukrainian government in its fight to defend itself against the Russian-backed incursion in Crimea.

CORRECTION: An earlier version of this story misstated the standard for obtaining a FISA warrant.

Stone is a McClatchy special correspondent.