The Kremlin said on Wednesday the idea that US President Donald Trump could have worked for Russian Federation was stupid.
Lavrov said the US ignored Moscow's offer to inspect a Russian missile that Washington claimed violated the 1987 Intermediate-Range Nuclear Forces Treaty.
Lavrov said Trump's right to conduct foreign policy is "under attack from Congress and this doesn't make these attacks constitutional or less illegal".
The arrest has further strained relations between Moscow and Washington, which have soured over Russia's 2014 annexation of Crimea, and subsequent economic sanctions and accusations of meddling in the USA presidential election.
"President Trump has actually been tough on Russian Federation", she said. "How can one comment on such a stupid thing?" He said Whelan was caught red-handed and the investigation is ongoing.
The brother of a former U.S. Marine with multiple citizenships says Irish government representatives have visited Paul Whelan at the Russian prison where he is being held on an espionage charge. Ushakov snapped when asked if Trump was a Russian agent.
Mr Lavrov noted that earlier this week, the U.S. had ignored Moscow's proposal to inspect a Russian missile that Washington claimed had violated a nuclear arms treaty.
Lavrov also praised the close cooperation and coordination between Moscow and Beijing in global affairs, including within BRICS (Brazil, Russia, India, China and South Africa), the Shanghai Cooperation Organization and the United Nations, as well as harmonizing the Eurasian Economic Union with the Belt and Road Initiative.
He said that Russian Federation made the offer during talks in Geneva, but the USA negotiators stonewalled the proposal, repeating Washington's demand that Russian Federation destroys the 9M729 missile it claimed violated the 1987 Intermediate-Range Nuclear Forces Treaty.
The statement said USA officials were expected to visit Thursday; the US ambassador saw him on January 2. He said the USA negotiators stonewalled the offer, repeating Washington's demand that Russian Federation destroys the weapon it claimed violated the Intermediate-Range Nuclear Forces Treaty. But Russia's Foreign Ministry said in a statement that David Whelan was not at their capital, according to state news agency Interfax.
Mr Lavrov insisted that Moscow was not taking any sides over Britain's exit from the EU.
Russia's foreign minister says that Moscow expects the Syrian government to take over territory in the country's east following the USA military withdrawal.