It seems clear that President Trump spent his first months in office making repeated attempts to end the investigation into Russia and his campaign. He asked Comey repeatedly to stop the probe, to pledge his loyalty. He asked the heads of the other major intelligence agencies, DNI, CIA Chief, NSA Chief to publicly discredit the investigation and also to intervene with Comey to end the investigation. He eventually fired Comey, by his own account, to end the Russia investigation. It is hard to imagine what more he could have done to impede or end the probe.
Trump loyalists continue to point out these are conversations and allegations, not evidence or facts.
It's truly incredible how many people believe the mainstream media witch hunt on the Trump Russia collusion without any evidence.