ROMEUS Secretary of State Mike Pompeo visits Rome on Wednesday (Sept 30), just a month ahead of the US presidential elections and hot on the heels of a diplomatic breach with the Vatican, that experts see as an effort to win conservative Catholic votes.
Mr Pompeo will not meet Pope Francis because the pontiff avoids such audiences in campaign periods, a Vatican source said.
Analysts say the Pope has also been angered by Mr Pompeo's public calls for a historic Vatican-China accord to be scrapped.
Instead, Mr Pompeo will speak at a symposium organised by the Holy See's US embassy in the Italian capital on Wednesday, before meeting the Vatican's Secretary of State Cardinal Pietro Parolin on Thursday.
Pope Francis has been working hard to repair ties with China, but his overtures run contrary to US President Donald Trump's efforts to push a religious freedom theme against the Communist country in his campaign for another term.
Mr Pompeo, an evangelical Christian, went on the offensive earlier this month, calling a Sino-Vatican 2018 agreement on appointing bishops, which is up for renewal, a risk to the church's "moral authority" given Beijing's human rights record.
Powerful Cardinal Oscar Maradiaga said the US intervention was unwelcome, and clearly linked to the election campaign.
"They're looking for Donald Trump to get elected, and everything is based on that logic. In this sense, I don't think they're acting in the interests of Americans," he said in an interview with the Repubblica daily on the eve of Mr Pompeo's visit.
Pope Francis' opening towards China had particularly angered the "anti-Francis" network close to the US president, he said, led by Archbishop Carlo Maria Vigano, the Vatican's previous envoy to the US, and Mr Steve Bannon, Mr Trump's previous advisor.
Professor Massimo Faggioli, a theologian at the Villanova Catholic University in the US, said there was a concerted effort under way to "turn a certain anti-Francis and anti-Vatican sentiment, which has become more visible in recent years, into votes for Trump".
"Vatican diplomacy is being used for propaganda," he said.
According to the Pew Research Centre, around half of Catholic registered voters describe themselves as Republicans or lean towards the Republican Party, while roughly the same identify with or lean towards the Democratic Party.
A "notable majority of white Catholics" voted for Mr Trump last time, Prof Faggioli said, and "the plan is to keep this bloc of white Catholic voters in some states where it's especially needed".
Mr Pompeo is also set to meet Italy's Prime Minister Giuseppe Conte and Foreign Minister Luigi Di Maio on Wednesday to discuss US efforts to deter European allies from using equipment by Chinese manufacturer Huawei in developing their 5G networks.
The US accuses Huawei of being a tool for Chinese espionage.
Italy insists its Golden Power lawwhich allows the government to impose conditions, restrictions or a ban on foreign investment in strategic industriesprotects it from risk.
Nonetheless, Mr Conte promised the previous week to take stronger measures to ensure national security in the country's 5G networks.
Talks will likely also touch on Italy's involvement in China's ambitious Belt and Road trade and infrastructure investment plan.
Rome became the first G7 country to sign up to the plan the previous year, a move sharply criticised by those who fear the investment scheme will allow key trade secrets and technologies to slip into Beijing's hands.