A group of 75 former U.S. ambassadors and State Department officials has signed a letter endorsing Hillary Clinton and denouncing Donald Trump.

Among the 75 individuals are 57 ambassadors who were chosen by Republican presidents. All of these ambassadors, along with the rest of the group, believe that Donald Trump is “entirely unqualified to serve as President and Commander-in-Chief.”

The group of foreign officers all said that, while they do not necessarily agree with all of Clinton’s decisions, they still support her over her opponent. For many members of the group, this is the first time that they have publicly endorsed a presidential candidate, and they explained that their reasoning for doing so now is “because the stakes in this election are so high.”

The letter emphasized the fact that the 2016 election is very different from any other election that the group’s members can remember. The diplomats also didn’t mince words in explaining their reasoning for finding Trump so unqualified to be president.

Trump is described as being “ignorant of the complex nature of the challenges facing our country.” Included in these challenges were “Russia,” “China,” “ISIS,” “nuclear proliferation,” “refugees,” and “drugs.” The letter also criticized Trump for not only being inexperienced but also for being unwilling to learn about these important subjects.

Trump was also criticized for his support of Vladimir Putin and the simultaneous xenophobia and racism he has expressed towards immigrants. As it is written in the letter, he has “insulted our allies and comforted our enemies.” The group explained that they “fear the damage that such ineptitude could cause in our closest relationships as well as the succor it might offer our enemies.”

The group also praised Hillary Clinton in their letter, specifically her handling of foreign affairs, which was described as having “consistently sought to advance fundamental US interests.” They added that they have “profound respect” for Clinton’s “skills, dedication, intelligence, and diplomacy.”

The last paragraph of the letter makes it clear that, in the minds of these 75 diplomats, Hillary Clinton and Tim Kaine are the only people who are qualified for the jobs of president and vice president.

In addition to the reasons listed in the letter, several of the signers explained in interviews a variety of other reasons for choosing to endorse Clinton. For example, Edward Marks, who was ambassador to Cape Verde and Guinea-Bissau during Ronald Reagan’s administration, explained that he was very troubled by Trump’s statement that he would use “torture [and] … collective punishments as elements of U.S. policy.”

Another former ambassador, Ryan Crocker, explained that his reasons for signing the letter had to do with concerns about national security. He said that he doesn’t know Donald Trump or know exactly what he would do if he were made president, but, based on the things Trump has said, he doesn’t want to find out. He also described the current election as “scary.”