'Corruption isn't fought with slogans on TikTok," complained veteran Colombian presidential candidate Gustavo Petro. But social media can win elections, and a right-wing dark horse called Rodolfo Hernández, who calls himself the "King of TikTok", may crush Mr Petro's hopes of becoming Colombia's first-ever leftist president next Sunday.
It did seem that Mr Petro's moment had finally arrived. Going into the first round of the presidential election last month he was well ahead of the establishment candidate, Federico Gutierrez, a serviceable replica of outgoing president Ivan Duque -- but the runner-up was actually Mr Hernández, whose social media skills make him a real threat to Mr Petro.
Mr Hernández is a wealthy 77-year-old businessman whose resemblance to Donald Trump is more than skin-deep. He flaunts his ignorance proudly, his speeches consist mostly of slogans and abuse, and he almost never discusses actual policies. But he does promise to kick out the corrupt politicians.
"Almost all of them are robbers, thieves, scoundrels, delinquents," he claims, and he's about half-right. Indeed, he may be one himself: he faces a graft investigation from his time as mayor of the city of Bucaramanga.
Mr Hernández is not a new phenomenon in Latin America: Brazil's President Jair Bolsonaro has been doing a Trump tribute act for years. And while he may manage to deflect the "pink tide" from sweeping across Colombia, it will still cover most of the region by the end of this year.
It's called "pink" to distinguish it from the "red tide" of Communist and other hard-left militants who made major inroads in Latin American politics in the latter half of the 20th century.
In most Latin American countries these revolutionary movements were stamped out by US-backed military coups. In a few countries -- Cuba, Nicaragua, Venezuela -- they live on as stagnant and impoverished dictatorships. But with the end of the Cold War the passion gradually went out of the politics, and the extremists faded away on both sides.
What's left is a "pink tide" of non-violent social democrats, competing in democratic elections with conservative parties that defend the interests of the local establishments. There's nothing uniquely Latin American about this, nor about the fact that the conservatives are increasingly resorting to populist strategies.
The difference is that Latin American countries are much more unequal than those in other parts of the West (except the US), which probably explains why there is a "pink tide" of social-democratic governments coming to power in Central and South America.
That tide began to run around the turn of the century, with the elections of Ricardo Lagos in Chile (2000), Luiz Inácio 'Lula' da Silva in Brazil (2003), and Néstor Kirchner in Argentina (2003). Its most recent successes have been Luis Arce in Bolivia (2020), Pedro Castillo in Peru (2021) and Xiomara Castro in Honduras (2022).
Not to mention the election of Mexico's first socialist president, Andrés Manuel López Obrador in 2018, and the likely return to power of Lula da Silva in the Brazilian election next November.
Colombia, with 50 million people, is third-biggest, and it may also turn pink this month. In the first round Gustavo Petro got 40% of the votes and Rodolfo Hernández only 29%. The populist right-winger will probably pick up more votes from the candidates who were eliminated in the first round than Mr Petro will, but it's heading for a photo-finish.
Either way, Colombia is heading for major change. If Mr Hernández wins, he's proposing to declare a state of emergency for 90 days and suspend all judicial and administrative functions "in order to address corruption". He will rule by decree, in other words, and he gets to choose who is arrested. It could end up as a populist dictatorship.
Unlike Mr Hernández, Mr Petro has been active in politics for the past 30 years. He's not really radical, but he would be Colombia's first-ever president from the left, so for some Colombians his policies would seem extreme: things like expanding social programmes and ending oil and gas exploration.
To pay for all that, he's planning to raise taxes on the country's 4,000 richest people and on the mining industry. He will be making enemies of some powerful people, and the head of the Colombian army has already expressed his concern.
Colombia has a long, unbroken tradition of "conservative" rule, and an almost equally long history of low-level civil wars. Change there is risky, and what is on offer from the right this time may be even more destabilising than what is being offered by the left. But in general, the pink tide is still rising.
