It is also looking at whether there was any coordination between Russia's efforts and the campaign and whether crimes were committed. He restated that there was not a wiretap against Trump Tower, but did not rule out other kinds of surveillance against the Trump campaign.
The question of ties to Russian Federation has haunted Mr Trump's administration in its first two months. So at the crack of dawn, Trump was trying to dismiss this topic.
Comey and Rogers had both made it plain that they stood by their earlier assessment that Russian Federation had indeed hacked the email accounts of Democratic officials, and provided those emails to WikiLeaks, in order to damage the electoral chances of Trump's opponent, Hillary Clinton. "Big advantage in Electoral College & lost!"
Mr Comey said leaks of classified information constituted serious crimes that must be investigated and prosecuted. "Must find leaker now!" There was much wrong and false about Trump's mini-missives.
Rep. Adam Schiff, the California Democrat and ranking member on the House Intelligence Committee, said in his lengthy opening statement that Trump's wiretapping allegation against Obama is "slanderous". But Clapper certainly left open the possibility that such evidence could emerge. More importantly, and for the purposes of our investigation, it simply does not matter. And it's one we've lived with since the late 1970s.
Another tweet charged that Democrats "made up and pushed the Russian story as an excuse for running a bad campaign". He did say, though, that he thinks that the Gallup poll putting his job approval rating at 37% (per CNN) is - you guessed it - fake news. That would mean he does not accept the assessment. He is characterizing a reality that is politically inconvenient for him as nothing but a made-up story concocted by his political enemies.
Schiff referred to President Trump's former national security adviser, Michael Flynn, who misled administration officials about a phone call he had with the Russian ambassador to the US regarding USA sanctions against Russia. In other words, this stuff is real.
"Because it is an open, ongoing investigation and is classified, I can not say more about what we are doing and whose conduct we are examining", Comey added on the Russian investigation.
"This is one of those circumstances", Comey said. The Department of Justice has asked me to share with you that the answer is the same for the Department of Justice and all its components: "the department has no information that supports those tweets", he said.
The American people deserve better from their Federal Bureau of Investigation director, and if Comey proves to be incapable of exercising greater prudence, perhaps it's time for someone more careful and considerate to take the helm at one of the world's most powerful government agencies. "Why was it necessary to fire him?"
"Is the investigation into the leak of classified information, has it begun yet?"
On claims Obama asked Britain's GCHQ to eavesdrop on Trump.
But to the public, it sounds like, "Trump is a liar". But collusion is hardly the only question at hand.
Two senior officials in the Trump administration have been caught up in the affair - Attorney-General Jeff Sessions and former national security adviser Michael Flynn. (Trump and Flynn were briefed on this in mid-August.) So when was Flynn in contact with the Russian ambassador?
"Mr. President, the Russians hacked our election and interfered". This would be aiding and abetting a foreign power that was engaged in political warfare against the United States.
Comey, however, refused to divulge any details of the ongoing probe.
That revelation fanned the flames of a low-level fire crackling in the US capital over why the Putin government intervened in the USA election, what its motives would have been and to what extent, if any, the Trump team was involved.
Republicans need Trump to ram through their health bill, tax legislation and various other agenda items.
Even if we assume Comey didn't botch the Clinton email investigation - which is quite an assumption to make, especially considering how outraged so many investigators in the FBI were in the weeks and months following Comey's announcement - why does the FBI director continue to comment on ongoing investigations? Director Comey, was the president's statement that Obama had his wires tapped in Trump Tower a true statement?
Though Mr Comey would not discuss specific evidence, he went far beyond his testimony from a hearing in January, when he refused to confirm or deny the existence of any investigation exploring possible connections between Trump associates and Russian Federation, consistent with the FBI's long-standing policy of not publicly discussing its work.
He confirmed in an extraordinary revelation that the agency is investigating whether there was Kremlin collusion with the Republican's run for office.
"If we're going to protect the country, we need to know exactly what the Russians did, how they did it, how to protect ourselves, how to protect our European allies who are facing elections right now that the Russians are interfering in".
Hours before Mr. Comey's testimony, Mr. Trump tried to push the conversation in a different direction in a series of Twitter messages.