The phrase "aides emphasized he was" is correct and usable in written English.
It can be used when reporting what aides have stated about someone, often in a context where their statements are significant or noteworthy.
Example: "During the press conference, aides emphasized he was committed to the new policy changes."
Alternatives: "aides highlighted he was" or "aides stressed he was".
Leadership aides emphasized that Mr. McConnell was not advocating any specific plan, nor was he saying that extending the middle-class tax cuts was the only option to resolve a potential fiscal crisis next month when hundreds of billions of dollars in tax increases and automatic spending cuts are scheduled to kick in.
White House aides emphasized that Ms. Rodriguez was consulting with Mr. Riordan on her own time and that her presence here did not signal any endorsement of Mr. Riordan by the president.
And besides, Ms. Harris and other aides emphasized, the mayor is never really that far away, no matter what continent he happens to be on.
Administration aides emphasized the meeting is part of its ongoing relations with the business community and not a postelection public relations move for Obama.
But Democratic aides emphasized that nothing is settled yet.
All told, were the president to cancel all potential military construction projects — a move the aide emphasized was "not realistic" — he could get $23 billion toward his wall.
All last week, Mr. Obama and his aides emphasized that their goal was to defeat Al Qaeda — the Taliban, officials have argued since 2009, simply need to be "degraded" as a force, so that Afghans can fight them and the United States can leave.
Mr. Bloomberg and his aides emphasized that the city was spending $243 million more on education in 2009 than it did this year.
Mr. Lieberman's aides emphasized that the committee was seeking records that date to 1992 and cover the administrations of both George W. Bush and Bill Clinton.
