"It was nothing short of treasonous", John O Brennan, a former Central Intelligence Agency director fired by Trump in 2017, said in a tweet.
"It was nothing short of treasonous", Brennan tweeted. Armed with those indictments, Trump could have forcefully confronted Putin.
"Yes, I did", Putin said. "It was wonderful and very, very disturbing".
All of them were left in limbo by Mr. Trump's.
During Monday's summit between President Donald Trump and Russian President Vladmir Putin plenty of news was made, but one man in particular was singled out during the one-on-one between the two heads of state - American-born financier Bill Browder.
"No prior president has ever abased himself more abjectly before a tyrant", said McCain in a statement.
Asked whether he believed Putin or United States intelligence agencies about Russian election meddling, Trump did not hesitate to back Putin.
"We've known for years that the Russians routinely try and influence USA elections", he said.
Two more British citizens were poisoned earlier this month using Novichok - a Soviet-era nerve agent that the British government says is linked to Russia's spy agencies. Washington's North Atlantic Treaty Organisation allies and many seasoned observers on Capitol Hill must have been watching in horror.
Other high-profile Republicans also expressed dismay. "He defends the interests of the United States of America, and I do defend the interests of the Russian Federation".
"I consider them (the talks) very successful and useful", Putin said, praising the "frank and business-like atmosphere" of the summit.
Huntsman hasn't commented since the summit, which comes just days after the Justice Department indicted 12 Russian intelligence officers for hacking the Democratic National Committee during the 2016 election.More news: Putin 'proud' of Russia's handling of World Cup
More news: Russian Spies Indicted for Hacking Related to 2016 Presidential Campaign
More news: Novak Djokovic defeats Rafael Nadal in epic Wimbledon semi final
"What vehicle will Vladimir Vladimirovich (Putin) use to move around Helsinki?" an interviewer for pro-Kremlin broadcaster RT asked Putin spokesman Dmitry Peskov in an interview published on Monday.
President Trump and Russian President Vladimir Putin shake hands at their summit in Helsinki, Finland, on Monday.
The Republican rebuke from Capitol Hill came largely from those lawmakers who have been willing to openly criticize the president.
On Friday, a USA special counsel unveiled indictments of 12 Russian spies on charges of hacking Democratic Party computers as part of election meddling, the second set of charges against Russians in a probe that Trump calls a political witch hunt.
In the past, I was foolish enough to give credence to things like: last week's detailed indictment of 12 Russian military intelligence agents accused of interfering with the 2016 election; Putin's illegal annexation of Crimea; Putin's propping up of the murderous Syrian dictator Bashar al-Assad; and the numerous journalists and political opponents who have not-so-mysteriously been murdered in Russia under Putin.
There were mixed reactions on Fox News Channel, whose commentators usually represent Trump's biggest supporters.
"Presidents Trump and Putin respect each other and they get along well", Kremlin spokesman Dmitry Peskov said. I will say this: I don't see any reason why it would be, but I really do want to see the server.
Democrats also sounded alarm.
In a strongly-worded statement, Mr Ryan said: "There is no moral equivalence between the United States and Russian Federation, which remains hostile to our most basic values and ideals".
The US and Russian leaders came out of their meeting in Helsinki expressing a desire to cooperate on global challenges, after talks on an array of issues from Syria, Ukraine and China to trade tariffs and the size of their nuclear arsenals.
"I hold both countries responsible".
"This answer by President Trump will be seen by Russian Federation as a sign of weakness and create far more problems than it solves".