Fox News chief White House correspondent John Roberts reported Thursday morning on the current frontrunners to be nominated by President Trump to be the nation's next Supreme Court justice.

Roberts said Trump spoke to six candidates: Appeals court judges Brett Kavanaugh, Raymond Kethledge, Amy Coney Barrett, Amul Thapar, Joan Larsen and Thomas Hardiman. The interviews comprised seven conversations, since Trump talked to one candidate twice.

According to Roberts, the shortlist of main contenders has narrowed to Kavanaugh, Kethledge and Barrett, with Kethledge's stock "rising" in the past few days. Sen. Mike Lee (R-Utah) spoke to Trump twice, but is not said to be under consideration to replace retiring Justice Anthony Kennedy, Roberts explained.

Cast and Crew Quit During Filming of Pro-Life 'Roe v. Wade' Film

Candace Owens: There Will Be a 'Major Black Exit' From the Democratic Party

Roberts said he'd rank Kavanaugh at the top right now, with Kethledge second and Barrett third. Some conservative groups have objected to Kavanaugh over a past ObamaCare ruling.

Kethledge is described as a "strict constitutionalist" in the mold of Neil Gorsuch, Trump's first Supreme Court pick, but objections have been raised over his light judicial record.

Trump has completed the interview process and is scheduled to announce the selection on Monday night.

Watch his full report above.

WATCH: Texas Teen Attacked in Restaurant for Wearing 'MAGA' Hat

'I Stand for the Flag': Band Performs Patriotic Song That Facebook Flagged as 'Political Content'