Dmitry Zakharchenko was sentenced to 13 years in a maximum security correctional facility and slapped with a fine of around $1.8 million.
"Considering that we have met over the past two weeks for two times, that's a reason for some optimism," Russian Foreign Minister Sergey Lavrov told Secretary of State Mike Pompeo.
The subpoena was the first to target a member of the president's family.
Images and videos of the Aeroflot Flight SU1492 were shared online, showing flames and smoke shooting from the aircraft as passengers and crew escaped using emergency slides from the plane.
"This is not an issue for us, it is not a thing that interests us or causes us concern," Kremlin spokesman Dmitry Peskov said.
"During the Cold War, we understood each other's signals. We talked," U.S. Army General Curtis Scaparrotti said. "I'm concerned that we don't know them as well today."
"The hand of 'democracy' squeezes the throat of freedom," Russian Foreign Ministry spokesperson Maria Zakharova wrote on Facebook.
"This is not about the Mueller report," "Morning Joe" host Joe Scarborough said.
Kremlin spokesperson Dmitry Peskov said "such actions by the United States do not lead to a strengthening of an atmosphere of security and stability in the region."
"Anti-Russian sentiment has always been used as an electoral tool in the U.S.," Dmitry Peskov said.
"Through legal trickery Deep State hitman Robert Mueller has guaranteed that my upcoming show trial is before Judge Amy Berman Jackson, an Obama appointed Judge," Stone wrote for the Instagram post's caption.
"This is Vladimir Putin, who he was trying to do business with, who was helping him win the election," Jeffrey Toobin said.
"What is it that they so desperately want to cover up?" Glenn Kirschner asked. "The concentric circles are tightening and tightening."
"It really was just a nonfactor in our minds," the first daughter said.
Months after Russia seized three Ukrainian navy ships in the Sea of Azov, the project is more relevant than ever.
"The launch aimed to confirm the advanced missile system's capabilities and flight characteristics," the Russian Defense Ministry said.
The Russian foreign minister raised concerns that Washington was "dramatically" lowering the "threshold for the use of nuclear weapons" while increasing "the risk of a nuclear conflict."
"People need to stop saying that Donald Trump is taking a different position than all of his intel chiefs and from the United States military," "Morning Joe" host Joe Scarborough said.
"The media's hysteria by and large is groundless," Kremlin spokesman Dmitry Peskov said.
The State Department is not saying when it will implement the sanctions, noting that there is no deadline in the law for imposing them.
There were over 70 passengers and crew on board.
"Whether it amounts to criminal conduct, clearly the efforts of the House Republicans were designed to impede and throw sticks into the spokes of the Mueller investigation," Democratic Senator Sheldon Whitehouse said.
The president phoned a New York Times reporter after a meeting with the Russian leader at the 2017 G20 summit and said he accepted Putin's denial.