Prime Minister May said Trump is well-positioned as he prepares to meet with Putin, saying "what is important is that the president goes into this as he is doing from a position of strength and also from a position of unity in North Atlantic Treaty Organisation".
Still, Trump did not back away from his comments, reaffirming that he would handle Brexit differently than May and saying he believes that Johnson, May's chief political rival in her own party who resigned from her Cabinet this week over the issue, "would be a great prime minister".
The indictments announced Friday were not directly related to Mueller's reason for being - but did involve the Russians' involvement in hacking the Democratic National Committee's computer network.
Trump said following an emergency session of North Atlantic Treaty Organisation members, the military alliance is "very unified, very strong, no problem".
On Thursday, the American president was reported to have arrived late at a closed session Thursday morning, on the second day of the summit, and disrupted talks with the Presidents of Ukraine and Georgia regarding the accession of their nations to North Atlantic Treaty Organisation, in order to slam allies on defense spending shortfalls. "But you never know what happens, right".
Russia's Foreign Ministry is denouncing the United States' indictment of 12 alleged military intelligence agents accused of hacking into Democratic accounts in the 2016 U.S. elections.
McCain, though the only republican to have spoken out, is not alone in his calls for Trump to cancel the meeting.
Browder, a financier and vocal Putin critic, said the Russian president should not be given an opening to be on an equal stage to the leader of the free world after invading foreign countries and meddling in the US elections.
Angela Merkel did not address the U.S. President's comments directly when she spoke to reporters before leaving Brussels, but made her position clear that Germany had already been increasing its commitment to North Atlantic Treaty Organisation.
She highlighted the attack on the Skripals as an example of "a well-established pattern of Russian behaviour to undermine our democracies and damage our interests around the world".
But CNN reported that White House officials said the Putin summit would proceed as scheduled. He said the indictments are "further proof of what everyone but the president seems to understand: President Putin is an adversary who interfered in our elections to help President Trump win".
"I will tell you this, Russia: If you're listening, I hope you're able to find the 30,000 emails that are missing", Trump said at a Florida news conference on July 27, 2016.