Christians United for Israel, an influential evangelical group, did not invite former President Donald Trump to its annual summit being held just miles outside of the nation's capital July 16-18.

"While he has been invited in the past, former President Donald Trump was not invited to speak at this year's summit,” a senior CUFI source told the Washington Examiner.

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Trump had cited a scheduling conflict for his skipping the conference, but the Messenger first reported on Friday that Trump was actually not extended an invitation, although he is the current front-runner in the GOP presidential race.

Other Republican presidential candidates, including Trump's former running mate Mike Pence, former South Carolina Gov. Nikki Haley, and Gov. Ron DeSantis (R-FL), will appear at the gathering.

This marks at least the third cattle call of 2024 candidates that Trump has not attended in recent months. Trump is forgoing the Family Leader's conference in Iowa on Friday, and he did not attend Sen. Joni Ernst's (R-IA) annual "Roast and Ride" fundraiser last month.

Bob Vander Plaats, president and CEO of the Family Leader, said it was a "mistake" for Trump to skip the event, "because this is a very vital base." Trump will, however, attend Charlie Kirk's student group, Turning Point Action, at their conference in West Palm Beach, Florida, over the weekend. But DeSantis won't be at the Turning Point Action conference, even though he is the governor of the Sunshine State where the event is being held.

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The CUFI was founded by Pastor John Hagee and remains the largest pro-Israel group in the nation. Its members are a key group that any 2024 Republican candidate will need to court in order to secure the presidential nomination.

Representatives with the Trump campaign did not respond to the Washington Examiner's request for comment.