The danger for Mexico is that it will become a failed state like Cuba and Venezuela
Mexico has been losing a war with a criminal insurgency that has not only run drug cartels but is also murdering politicians and anyone who might oppose it. It has failed to protect the people from this menace and is more likely to cut a deal with the crooks. The cartels are also responsible for human trafficking through Mexico to the US border and the government has done nothing to stop this illegal conduct. I suspect the trafficking could get worse with the new government.
Mexico’s New Leftist President Is Not A Threat, But The Collapse Of Mexico Is
The real danger isn’t that Mexico elected a left-wing populist as president, it’s that the new president won’t be able to govern his country.