Donald Trump met privately with Indiana governor Mike Pence inside the governor's mansion on Wednesday – and brought his influential children along – as speculation over Trump's final vice presidential pick reached fever pitch as Trump prepares to reveal his choice Friday.

Trump, who was overnighting in Indiana Wednesday evening, tweeted that he 'will be making the announcement of my Vice Presidential pick on Friday at 11am in Manhattan. Details to follow.'

Trump was accompanied by daughter Ivanka Trump, her husband Jared Kushner, Donald Trump Jr. and Eric as he entered the governor's mansion.

The breakfast meeting was a sign that Pence, the former House Republican leader who is well regarded by conservatives and establishment Republicans, remains a leading contender to be Trump's running mate.

'It's a little bit like 'The Apprentice,'' former House Speaker Newt Gingrich, another VP finalist, told Fox News Channel Tuesday. 'You find out sooner or later who the last one standing is.

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Trump brought along his daughter Ivanka, sons Donald Trump Jr., Eric and son-in-law Jared Kushner to his meeting with Indiana governor Mike Pence

Ivanka is pictured above in a blue and white summer dress as she supported her father

Donald Trump Jr, Ivanka and Jared can all be seen above surrounded by security

There are strong indications that Trump's family members, who have become close advisors inside his campaign, are engaged in a final round of vetting of vice presidential finalists.

NBC's Kelly O'Donnell reported Wednesday that New Jersey governor Chris Christie had already met with the other Trump family members, and that former House speaker Newt Gingrich was jetting to Indiana for a meeting of his own.

Gingrich and Fox News agreed to part ways this week on the former speaker's role as a paid Fox consultant. Gingrich appeared with Trump at a rally in Cincinnati, as Trump gave leading contenders public try-outs for the job.

Each of the apparent finalists offers something different. Pence has support from D.C. power-brokers, and some of the professionals on his campaign team, and would be a potential way to unify the party, something Trump says he wants to do.

Trump confirmed that he'll be revealing his pick on Friday

Donald Trump appeared with Indiana governor Mike Pence at a rally in Indiana Tuesday night, in what is seen as a tryout for the possible running mate

Many top Republicans are skipping the GOP convention, although Speaker Paul Ryan, who knows Pence well, is speaking. His resume and conservative issue positions might assuage conservatives who worry about some of Trump's past positions and more recent statements on social issues.

Christie has become a close advisor to Trump ever since he dropped out of the presidential race and endorsed him. He also impressed Trump by destroying senator Marco Rubio in a New Hampshire debate – a move that played to Trump's benefit ultimately.

Gingrich is known for a sharp mind and slashing attacks on Hillary Clinton, and for his deep familiarity with the political levers in Washington.

Ivanka Trump has taken on an important advisory role inside the Trump campaign, as has Kushner. Both of them accompanied Trump when he traveled to D.C. last week to meet with GOP members near the Capitol. Donald Trump Jr. has taken on speaking roles at some Trump rallies.

New Jersey governor Chris Christie has become a close advisor to Trump

Trump says he's looking for a 'fighter skilled in hand-to-hand combat, which would certainly apply to former Speaker Newt Gingrich, who helped seize the House from the grip of Democrats

Trump said Tuesday he is looking for a 'fighter skilled in hand-to-hand combat' as his running mate, he told the Wall Street Journal.

At Tuesday night's rally with Pence, Trump said: 'I don't know whether he's going to be your governor or your vice president. Who the hell knows! Good man.'

Pence faces a tough reelection to the governorship, so would likely jump at the chance. He showed his own skill at going on the attack at the rally, going after Hillary Clinton for the attack in Benghazi.

'As the proud father of a United States Marine, let me say from my heart we don't need a president that took 13 hours to send help to Americans under fire,' said Pence. 'Anyone who did that should be disqualified from ever being commander in chief of the armed forces of the United States of America.'