As president, he could always have a teleprompter so this would not be an issue.
From the economist.com
Indeed, midway through his victory speech Tuesday, McCain's teleprompter failed.
From the time.com
That's why the new hot topic is, yes, Obama's love affair with the teleprompter.
From the denverpost.com
Dealing with it will require something with more firepower than a teleprompter.
From the washingtontimes.com
We also get to see Harry do some improvising when his teleprompter fails to work.
From the freep.com
Not long after that bit, a teleprompter failure left Samberg in a bit of a lurch.
From the washingtonpost.com
The truth is far more likely to come tumbling out when the teleprompter is off.
From the denverpost.com
Eventually the teleprompter lit up and the ESPY awards show was able to go on.
From the latimes.com
I always tell people they don't pay me to sit there and read the teleprompter.
From the denverpost.com
More examples
A prompter for television performers
A teleprompter (also known as an autocue or a telescript) is a display device that prompts the person speaking with an electronic visual text of a speech or script. Using a teleprompter is similar to the practice of using cue cards. ...
A screen placed in front of a person from which that person can read text while looking directly into the camera. The trademarked name is TelePrompTer.
Mechanical device that projects and advances text on a mirror directly in front of camera's lens, allowing talent to read their lines while appearing to maintain eye contact with viewers.
A trademark used for the device that shows an actor or a speaker an enlarged line-by-line reproduction of a script, unseen by the audience.
TV-like screen that displays the cue card words
Recording technique in which a person reads a script on camera projected onto a screen.
Device which scrolls text on a screen, to provide cues for a television/video presenter.
A camera mounted video monitor that displays script and or notes, visible to the speaker or performer, operated by a person at a computer who moves the script following the speaker.