Joe Biden has sent a savage message to Russia that the United States will no longer roll over in the face of aggression.
The new President has declared his tough new approach to Moscow and wants his counterpart across the Pacific to know that things are about to change.
During a visit to the State Department, Biden said he was keen on repairing alliances with other countries and has been communicating with world leaders recently to reiterate that mission.
But during his call with Russia, it wasn't exactly all roses and honey.
"I made it clear to President Putin in a manner very different from my predecessor, that the days the United States rolling over in the face of Russia's aggressive actions, interfering with our elections, cyber attacks, poisoning citizens are over," Biden said.
"We will not hesitate to raise the cost on Russia and defend our vital interests and our people, and we will be more effective in dealing with Russia when we work in coalition and coordination with other like-minded partners."
Trump was criticised for his 'friendly' relationship with Putin, as Reuters puts it, especially after a US intelligence report found Russia interfered in the 2016 Presidential election.
But Biden didn't just talk about what the future will hold, he also reaffirmed his beliefs on several other key past issues.
In his first presidential call to Russia, Biden raised issues around election interference, claims of Russia putting bounties on the heads of US soldiers in Afghanistan, as well as the ongoing opposition protests in Russia.
A statement from the White House read: "President Biden reaffirmed the United States' firm support for Ukraine's sovereignty.
"He also raised other matters of concern, including the SolarWinds hack...and the poisoning of Aleksey Navalny.
"President Biden made clear that the United States will act firmly in defence of its national interests in response to actions by Russia that harm us or our allies.
"The two presidents agreed to maintain transparent and consistent communication going forward."
Elsewhere, the leaders agreed to extend the New START for five years, meaning that both countries agree to having no more than 1,550 deployed nuclear warheads and 700 deployed missiles and bombers.
So, that's good news, right?
The Kremlin said the call was 'business-like and frank'.
The statement added that Putin 'noted that the normalisation of relations between Russia and the United States would meet the interests of both countries and - taking into account their special responsibility for maintaining security and stability in the world - of the entire international community'.