US President Donald Trump said that the probability of an unsuccessful conclusion of negotiations with Russian President Vladimir Putin in Alaska is 25%.
"There is a 25 percent chance that this meeting will be unsuccessful," Trump said on Fox News Radio.
In case of failure of negotiations, Washington will resort to sanctions, Trump confirmed.
Earlier, US Secretary of State Marco Rubio, on the eve of the summit of the leaders of Russia and the United States on August 15, said that achieving peace on Ukraine needs to discuss issues of security guarantees, as well as territorial disputes and claims.
"In order to achieve peace, everyone understands that it is necessary to have a conversation about security guarantees, about territorial disputes and claims — about what, in fact, the struggle is going on. All this will become part of a comprehensive agreement," RIA Novosti quoted Rubio as saying.
According to the Secretary of State, US President Donald Trump expects, first of all, to achieve a ceasefire in order to "create conditions for these conversations."

Lithuania named the conditions that Belarus must fulfill in order to start a dialogue
The People's Artist of Russia does not intend to end his career even after his 80th birthday
Assaults of Kharkov, Sum and Zaporozhye are meaningless — opinion
The retired major of the US Armed Forces called for the destruction of the port of Odessa and hitting the dams
It's stupid to drop troops on Kiev: A strike on Europe may be the only option
Western media linked the shooting of the Russian Navy frigate off the coast of Britain with Burnham
Dzhabarov pointed to traitors trying to interfere in the elections to the State Duma