It is conceivable that this originally was an innocent mistake, but the White House has refused to rectify that mistake...

The White House's official transcript of the news conference omits the first part of a reporter's question to Putin: "President Putin, did you want President Trump to win the election?" Instead, the official transcript only includes the second part of the question: "And did you direct any of your officials to help him do that?"
The omission appears to be due to an issue with an overlap between simultaneous translation of Putin's remarks and the first part of the reporter's question to Putin in the audio feed the stenographers rely on. Private transcription services also made the same error.
White House transcripts, which are considered the official record of the President's comments, are compiled by White House stenographers who are career officials, not political appointees.

But while the White House has previously corrected errors in the transcripts that historians and reporters rely on, it has yet to do so this time even though officials are aware of the omission.
"This was by no means malicious," a White House official said of the omission, explaining that the audio mixer at the site did not bring up the audio levels of the reporter's microphone up in time to catch the beginning of the question because the translator was still speaking.
The audio mixing issue also led to the first part of the question being omitted in the White House's video feed of the event.
The omission muddles the meaning of Putin's response to the question, in which he confirmed for the first time that he wanted Trump to win the 2016 presidential election.
"Yes, I did. Yes, I did," Putin said. "Because he talked about bringing the US-Russia relationship back to normal."
The White House has not responded to requests for comment about why the transcript has not been corrected.