A Trump organization staffer identified herself as the person responsible for plagiarism in Melania's Trump convention speech and offered her resignation Wednesday.
Meredith McIver apologized in a statement sent out by the campaign and said the Trumps did not accept her resignation.
McIver explained that she included the passages from Obama's speech after listening to Melania Trump read passages from the 2008 speech over the phone.
"Over the phone, she read me some passages from Mrs. Obama's speech as examples. I wrote them down and later included some of the phrasing in the draft that ultimately became the final speech. I did not check Mrs. Obama's speeches. This was my mistake, and I feel terrible for the chaos I have caused Melania and the Trumps, as well as to Mrs. Obama. No harm was meant."
Here's what to watch for tonight at the RNC:
Themed "Make America First Again," the day's speakers will make the case that United States' leadership role in the world has slipped under Obama and could be restored by Trump. The night kicks off at 7 p.m. ET.
The night's most prominent speech will come from Indiana Gov. Mike Pence -- who, as the GOP vice presidential candidate, will be the prime-time headliner.
Another close Trump ally and vice presidential contender, former House Speaker Newt Gingrich, is up Wednesday evening, as is Eric Trump, another of Trump's sons.
Many Republicans will be closely watching three relatively young contenders in the 2016 primary: Wisconsin Gov. Scott Walker, Florida Sen. Marco Rubio and Texas Sen. Ted Cruz. All three would be possible candidates in 2020 if Trump loses this year. Rubio won't be there in person but is submitting a video message.