Presidential candidate Donald Trump is certainly packed with personality and his John Hancock conveys that too.

'Besides the bigheadedness that shows in this script there is something else that is rather over-sized – the "p" in "Trump,"' wrote handwriting expert Michelle Dresbold. 'This large phallic symbal shouts, "Me ... big hunk of man."'

Dresbold, who graduated from the United States Secret Service's Advanced Document Examination training program and penned the book, 'Sex, Lies and Handwriting,' looked at a handful of the candidates' signatures and wrote what she found in a piece for Politico Magazine.

Donald Trump's signature's final 'P' is phallic in nature, suggested handwriting expert Michelle Dresbold, which shouts 'Me ... big hunk of man'

Trump's penmanship lacks curves and he writes using up and down angles. 'Angles show a writer who is feeling angry, determined, fearful, competitive or challenged,' Dresbold said. 'When a script is completely devoid of curves, the writer lacks empathy and craves power, prestige and admiration.'

Democratic frontrunner Hillary Clinton's writing is a mix of print and cursive, 'found in creative thinkers: artists, musicians, writers, attorneys and speakers,' Dresbold pointed out.

Her letters go straight up and down, which takes a lot of control.

And she's never dropped her maiden name from her signature, which is telling.

'Hillary clearly writes "Rodham" – clearly she doesn't want people to forget that she is, first and foremost, her own person,' Dresbold said.

STRONG WOMEN: Handwriting expert Michelle Dresbold noted that Hillary Clinton and Carly Fiorina have a straight down 'y' in their signatures, which shows a person is determined to make it in life

Clinton's "y" is straight down, just like Carly Fiorina's.

'This shows a person determined to make it in life,' Dresbold wrote.

The former Hewlett-Packard CEO dots her 'i' before writing the 'o' and finishing her last name's spelling.

'These breaks demonstrate that Fiorina is an intelligent, creative thinker,' Dresbold said, though honed in on the first letter of Fiorina's last name.

'Her "F" is formal and a bit pretentious,' Dresbold said. 'Showing that she likes things that look clean and proper.'

Running behind Clinton and Fiorina in the polls are Bernie Sanders on the Democratic side and retired neurosurgeon Ben Carson on the Republican.

The former GOP No. 2, who Fiorina leapfrogged after Wednesday night's Reagan library debate, has a signature that's crunched together.

'The "Ben" and "Carson" are so close together that they touch, which shows that growing up, Ben feared abandonment,' Dresbold said.

The exaggerated 'B' and 'C' 'shows a writer who can get stuck in his head and thought process,' Dresbold assessed. The ending of Carson's name, in which he loops the 'n' underneath the entire signature is a sign of 'confidence.'

BEN AND BERNIE: Ben Carson may have feared abandonment as a kid his signature is so crunched together, while Bernie Sanders' shows that he's 'emotionally driven'

Just like his campaign slogan 'JEB!' - Jeb Bush's signature puts more emphasis on his first name than his last, perhaps a sign that he's trying to downplay the family name

Bernie Sanders' signatures slants to the right, unlike his politics, but what that means, said Dresbold, is that he's emotionally driven: 'Their hearts rule their heads.'

Since he clearly writes out 'Sanders' the Vermont senator hopes for the best, but there's a doomsday outlook packed into his penmanship as well.

'"Bernie" looks like a "B" and an "X," which could be a sign that he has a fear of destruction and always has his eye out for the worst,' Dresbold wrote.

On Stephen Colbert's show GOP hopeful Jeb Bush explained that he simply used 'Jeb!' as his motto because 'it connotes excitement,' so it shouldn't be a surprise that the Bush scion and former Florida governor emphasizes his first name rather than his last when he signs things too.

'Interestingly, the "Jeb" is larger than the unreadable "Bush,"' Dresbold pointed out. 'This shows that Jeb wants to stand on his own two feet and would like to distance himself from the "Bush" name.'

Additionally, the big 'J' in Jeb shows he is willing 'to take on a lot of responsibility,' while the large uphill climb 'shows that he has confidence in himself and is willing to push onwards and upwards.'

Marco Rubio's signature (left) looks like the word 'Ma Ma,' while Ted Cruz's (right) defined 'd' means 'he will cut off anyone who thinks and sees things differently.'

Is that a bat and ball at the end of Chris Christie's name? This could literally mean that the New Jersey governor has a deep interest in the sport

Marco Rubio and Ted Cruz both have compact signatures.

Rubio's is hard to decipher, which could mean the Florida senator is a 'writer who doesn't want others to read him,' Dresbold said. Rubio's signature also looks like he's writing 'Ma Ma.'

'Could this be because Rubio's driving force is his mom and his family history,' Dresbold pondered.

Cruz's thick signature demonstrates the Texas senator is 'determined and dogmatic.' The 'd' at the end of his first name, ends abruptly, indicating he says what he means and 'he will cut off anyone who thinks and sees things differently.'

Meanwhile, Chris Christie, whose campaign was revived by his strong debate performance last Wednesday, has a signature that's a bit more fun.

'Chris Christie’s handwriting leans upward, expressing a positive, upbeat personality that is success driven,' wrote Dresbold.

The way the New Jersey governor crosses his 't' and dots his 'i' 'resembles a bat and ball,' Dresbold said. 'Which means Christie could have a deep interest in baseball.'

George Pataki's signature signifies that the former New York governor is well read and cultured

ALL BY MYSELF: Bobby Jindal's signature is difficult to read, which could mean he's feeling isolated and 'could start to unravel'

Former New York Gov. George Pataki, one of the four candidates to participate in the GOP's undercard debate last week, also has a signature that reflects his interest.

'His middle initial that resembles a backwards “3” indicates that he is well read and enjoys culture,' Dresbold noted.

And of all the candidate signatures, Louisiana Gov. Bobby Jindal's is the most impossible to read, which could be a sign of trouble.