Mexico's President Andres Manuel Lopez Obrador looks on during a news conference at the National Palace in Mexico City, Mexico, 10 February 2022; Credit: Reuters / Edgard Garrido

MEXICO CITY (Reuters) - A United States (US) decision to suspend avocado shipments from a violent Mexican state sealed a challenging week for President Andres Manuel Lopez Obrador, whose approval rating suffered an unusual dip in a tracking poll published on Sunday 13 February 2022.

President Lopez Obrador, whose still robust popularity has been more resilient than most global leaders, has this month become embroiled in a war of words with a critical journalist over his reporting on the lifestyle of one of the president's sons.

On Friday 11 February 2022, the president devoted a chunk of his daily news conference to criticising journalist Carlos Loret de Mola (and named his salary) just a day after authorities had confirmed the fifth killing of a media professional in Mexico this year.

"He's gone from being against the system to 'I am the system'", said Roy Campos, head of polling firm Consulta Mitofsky, whose tracking poll this weekend showed support for President Lopez Obrador taking its biggest daily drop in nearly two years.

The poll published on Sunday shows the left-leaning President Lopez Obrador with an approval rating of 61.2%, 0.6 percentage points lower than on Saturday 12 February 2022 and 1.5 points lower than a week earlier.

Andres Manuel Lopez Obrador argues that Carlos Loret de Mola is part of entrenched interests resisting his project of making Mexico a fairer society. But his singling out of the journalist at a time of heightened sensitivity about the profession has stirred unease.

Carlos Loret de Mola said the revelations have put him in danger and that President Lopez Obrador was angry because his reporting on the son's apparently expensive lifestyle sat awkwardly with the image of personal austerity the president has projected.

On Saturday, without mentioning Mr Loret de Mola, the US embassy in Mexico said it was "dismayed" by the situation journalists faced in the country, pointing to the latest killing.

Later in the day, the Mexican government said the US had temporarily suspended avocado shipments on security grounds from the western state of Michoacan, the country's top producing region, which has long been plagued by gang violence.

The US embassy said the US avocado inspection programme in Michoacan had been suspended pending a review of the security situation. Though exports are not "blocked", US officials must inspect all avocados being sent to the US, it noted.

Michoacan's governor Alfredo Ramirez pledged to get the suspension lifted quickly and Mexican media said he had agreed to meet US officials in the coming days for that purpose.

Meanwhile on Wednesday 9 February 2022, Andres Manuel Lopez Obrador for the second time in under a month received a visit from a top US government official flagging investor concerns about Mexico's plans to strengthen state control of its energy market.

The country is already facing economic headwinds as figures published late last month showed that Mexico slipped into a technical recession at the end of last year.

President Lopez Obrador has set a referendum for 10 April 2022 for the public to vote on whether he should see out the rest of his term, which is due to conclude at the end of September 2024.

Political analysts say there is almost no chance he will lose and many opposition politicians have distanced themselves from the referendum as unnecessary. The president has argued it is important that he be held to account by the public.