A Republican elector from Texas will not cast his vote for Donald Trump, saying: 'I am here to elect a president, not a king.'

Christopher Suprun, a conservative who worked as a firefighter in the wake of the September 11 attacks, slammed the president-elect for being unqualified, unfit and 'dismissive' of his own conflicts of interest in an op-ed piece in the New York Times on Monday.

In the US, presidents are elected by the Electoral College - not by the popular vote, where Hillary Clinton's lead has surpassed 2.5million ballots.

In most states, electors are 'bound' and required by law to cast a vote for the winner of their state's popular vote.

But other states like Texas don't have a rule against electors going rogue, and at least six Democratic electors have already expressed their intentions to try to block Donald Trump from securing 270 Electoral College votes on December 19.

Christopher Suprun (pictured), a Republican elector from Texas will not cast his vote for Donald Trump, saying: 'I am here to elect a president, not a king'

In the US, presidents are elected by the Electoral College - not by the popular vote, where Hillary Clinton's lead has surpassed 2.5million votes

In the Electoral College, however, Trump carries a lead of 306 to Clinton's 232. It would be unlikely 37 Republican electors would be convinced to change their votes

Suprun is just one of 38 electors in the Lone Star state, where Trump won by more than 9 points.

The faithless elector detailed his criticism in the Times on Monday, writing:

'Fifteen years ago, as a firefighter, I was part of the response to the Sept. 11 attacks against our nation. That attack and this year’s election may seem unrelated, but for me the relationship becomes clearer every day.

'George W. Bush is an imperfect man, but he led us through the tragic days following the attacks. His leadership showed that America was a great nation. That was also the last time I remember the nation united. I watch Mr. Trump fail to unite America and drive a wedge between us.

'Mr. Trump goes out of his way to attack the cast of “Saturday Night Live” for bias. He tweets day and night, but waited two days to offer sympathy to the Ohio State community after an attack there. He does not encourage civil discourse, but chooses to stoke fear and create outrage.

'This is unacceptable. For me, America is that shining city on a hill that Ronald Reagan envisioned. It has problems. It has challenges. These can be met and overcome just as our nation overcame Sept. 11.'

The paramedic from Dallas also cited the Federalist papers written by Alexander Hamilton as guidance, arguing that Trump did not meet the presidential standards.

Suprun was looking to vote for John Kasich, the Republican Governor of Ohio, instead

Hamilton argued for the Electoral College, writing that the group would ensure 'the office of President will never fall to the lot of any man who is not in an eminent degree endowed with the requisite qualifications'.

Suprun also attacked everything from Trump's demeanor to his White House picks, adding he 'could be impeached in his first year given his dismissive responses to financial conflicts of interest'.

'Mr. Trump lacks the foreign policy experience and demeanor needed to be commander in chief,' he writes.

'Mr. Trump urged violence against protesters at his rallies during the campaign. He speaks of retribution against his critics. He has surrounded himself with advisers such as Stephen K. Bannon, who claims to be a Leninist and lauds villains and their thirst for power, including Darth Vader. “Rogue One,” the latest “Star Wars” installment, arrives later this month. I am not taking my children to see it to celebrate evil, but to show them that light can overcome it.'

Suprun rallied his fellow electors behind a Republican alternative like John Kasich, Governor of Ohio, instead.

He said: 'I'm expecting backlash, but that has been par for the course this campaign. People are unhappy. They're angry. But I'm angry, too.'

It would be unlikely to convince 37 Republican electors to change their votes- the number needed to erase Trump's lead among the 538 total electors.

Even then, the Republican-controlled House of Representatives would be likely vote Trump into the White House anyway.

But some are hoping to undermine the institution itself, with one elector saying: 'If it gets into the House, the controversy and the uncertainty that would immediately blow up into a political firestorm in the U.S. would cause enough people — my hope is — to look at the whole concept of the Electoral College.'

Suprun, on the other hand, said the Electoral College system 'is fine as it currently exists.' His problem lies solely with Trump.

'I was told if we elected Donald Trump he would transform his personality into being presidential. He isn't,' Suprun said.

'I wanted him to be presidential, but since the election he hasn't grown into our institution, he's attacked them. I am here to elect a president, not a king.'

Suprun may have an ally in Michael Baca (pictured), an elector from Colorado, who signed an agreement with at least six others to try to block Trump from the presidency

He added: 'I am not sure of who I will vote for, but would have to strongly consider someone like Kasich who has both executive and legislative experience bringing people together.'

'I'm looking for someone we can all unify behind...Fifteen years ago, I swore an oath to defend my country and Constitution against all enemies, foreign and domestic. On Dec. 19, I will do it again.'

Suprun may have an ally in Michael Baca, an elector from Colorado, who signed an agreement with at least six others to try to block Trump from the presidency.

Baca, a registered Democrat and Bernie Sanders supporter, previously said he would consider voting for a moderate Republican like Kasich if it meant garnering more support.

Another Texas Republican elector, Art Sisneros, resigned last week rather than vote for Trump. He will be replaced when electors convene on December 19.

Sisneros wrote on his blog: 'If Trump is not qualified and my role, both morally and historically, as an elected official is to vote my conscience, then I can not and will not vote for Donald Trump for President. I believe voting for Trump would bring dishonor to God.'

Republican elector Baoky Vu of Georgia also expressed his resignations about voting for Trump and eventually resigned from the job.