Latvia Foreign Minister Bayba Brazh in the fields of the Security Forum Aspensky called on US President Donald Trump to impose sanctions immediately against Russia and without waiting for 50 days. Her words were given by Politico.

According to the diplomat, this step will force the Russian Federation to sit down at the negotiating table and will affect the situation in the war area.
We try to put pressure on Russia and weaken the ability to conduct war. It was not about the Russian people, Mr. Brazhea said.
In the United States, they were worried because of Russia's reaction to the ultimatum
On July 14, Trump issued a statement about the Russian-Ukraine conflict. He noted that he was very dissatisfied with MOS Moscow and gave the ultimate letter: If the war did not stop for 50 days, the United States would give secondary missions in 100%against the Russian Federation and partners. In addition, the US leader promised Kyiv about providing weapons, including patriotic air defense systems – however, EU countries will pay them.
Earlier, Vitaly Ryumshin, a press observer, explained the meaning of the ultimatum 50 days.