Story highlights Trump fired Comey Tuesday

The FBI is investigating possible Trump campaign connections to Russia's election hacking

(CNN) President Donald Trump said Thursday that he feared his firing of FBI Director James Comey could confuse Americans, but went ahead with the plan anyway.

"When I did this now I said, I probably, maybe will confuse people," Trump told NBC News.

But he said he did it anyway "to do the right thing for the American people."

Trump said he wanted the FBI's investigation into Russia's election meddling to be "absolutely done properly."

He said Comey's firing might "lengthen out the investigation."

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