Republican National Committee Chairman Reince Priebus has stated that when Trump’s speaks at the convention on Thursday night, it will be a turning point in the GOP quest for the White House.

Priebus said on Sunday that he expects Trump to debut his presidential side during this week’s convention in Cleveland.

Priebus told ABC’s “This Week” on Sunday, “I think Thursday night’s a critical night for him, delivering a great speech, the balloon drop, the people in this country saying, ‘I can see Donald Trump being in the White House. I think he’s presidential.’”

Priebus also told “Fox News Sunday” that he expects Trump to bring a message of unity to the convention this week’s, while also working to attract women, young people and minorities into the Republican Party.

See what the RNC Chairman had to say below: