Republican presidential front-runner Donald Trump has never voted in a Republican presidential primary election in his home state of New York, voter records show.

The same can be said of Trump's daughter Ivanka and his wife Melania.

The revelation will give his rivals a fresh line of attack as the billionaire presses voters to embrace him in upcoming primaries and caucuses.

Iowans will caucus on February 1, and New Hampshirites will follow them eight days later in the first-in-the-nation primary.

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PRIMARY FRESHMAN? Donald Trump has never voted in a Republican presidential primary, voter records show, even as he stumps for voters to support him in this year's primary contests

PRIMARY NO-SHOWS: Trump's daughter Ivanka (left) and wife Melania (right) also have not turned up to cast ballots in presidential primaries, according to election records

The records, pulled in September from the Board of Elections of the City of New York, show that Trump has voted consistently in general elections since 1989.

But his primary voting record is thin: just a New York City mayoral primary in September 2013 and a primary election for a U.S. Senate special election in September 2010.

There is no indication that he has voted in a presidential primary of any kind since 1989, a time-frame during which he has said he was a Democrat.

Former Florida Gov. Jeb Bush's campaign was eager to pile on via email.

'Donald Trump spent years as a Democrat and is not and has never been a conservative,' Bush press secretary Kristy Campbell told DailyMail.com.

'It should come as a surprise to no one that he has never voted in a Republican primary.'

Catherine Frazier, Texas Sen. Ted Cruz's press secretary, blasted The Donald for not being 'a true conservative.'

Cruz is Trump's nearest polling rival nationally and in Iowa.

'He speaks like a conservative out of political convenience not personal conviction,' Frazier told DailyMail.com. 'And voters can see that. They do not want a dealmaker who will compromise and serve as paymaster to the Washington cartel.'

PUSHBACK: A Ted Cruz spokesperson blasted Trump for being a fake conservative and said his thin primary voting history is proof

NOT SURPRISED: A Jeb Bush spokesperson said 'Donald Trump spent years as a Democrat and is not and has never been a conservative,' so his absence from GOP primary elections is no shock

A political operative who consults with a GOP Trump opponent provided the document to DailyMail.com.

They show election dates when each Trump voter, what type of ballot they used (for instance, R for 'regular' and A for 'absentee') and a column marked 'voter type' – always R for 'registered,' according to a New York City elections division clerk.

A Trump spokesperson did not respond to a request for comment.

A clerk who answered a call Thursday at the New York City Board of Elections said the records, as dictated over the phone, were accurate.

Voting records for Trump's adult sons, Donald Jr. and Eric, were not immediately available.

Trump is leading by wide margins in New Hampshire, South Carolina, Florida, and nearly every other state where pollsters take the Republican electorate's temperature.

In Iowa, he is running neck-and-neck with Republican Sen. Ted Cruz in some polls, and leading him comfortably in others.

On Thursday in Las Vegas, Trump boasted of a new Emerson College poll that shows him leading Cruz there by 10 points.

'Cruz is going down,' he told a packed ballroom at the South Point casino. 'He's like a nervous wreck. He's going down. He's had his moment.'