BBC HomepageSkip to contentAccessibility HelpYour accountLiveNotificationsHomeNewsSportWeatheriPlayerSoundsBitesizeMore menuMore menuSearch BBCHomeNewsSportWeatheriPlayerSoundsBitesizeCBBCCBeebiesFoodClose menuBBC NewsMenuHomeIsrael-Gaza warCost of LivingWar in UkraineClimateUKWorldBusinessPoliticsCultureMoreTechScienceHealthFamily & EducationIn PicturesNewsbeatBBC VerifyDisabilityWorldAfricaAsiaAustraliaEuropeLatin AmericaMiddle EastUS & CanadaWhy are US-Mexico border crossings at record levels?Published1 hour agoShareclose panelShare pageCopy linkAbout sharingImage source, Getty ImagesBy Bernd Debusmann JrBBC News, WashingtonMigrant arrivals at the border have risen to record highs during President Joe Biden’s administration, a massive political headache for him ahead of the election.Polls suggest that more than two-thirds of Americans disapprove of Mr Biden’s handling of the issue. His likely opponent in November’s presidential election, Donald Trump, has condemned the bill as not tough enough, a sentiment echoed by many conservative lawmakers on Capitol Hill. But it’s not just Republicans who are unhappy about it. Democratic mayors in cities struggling to cope with the influx are also making their feelings known.Senate unveils border and Ukraine deal – but can it pass?More than 6.3 million migrants have been detained crossing into the US illegally under Biden, a higher number than under Trump, Obama or George W Bush.The reasons for the spike are complex, with some factors pre-dating this government and beyond the control of the US. We asked experts what’s going on.Pent-up demand after lockdownThe number began to rise towards the end of the Trump administration, largely driven by Central Americans fleeing a series of complex crises including gang violence, poverty, political repression and natural disasters. That uptick came to a sudden halt in early 2020, when pandemic-era restrictions led to a drastic reduction of over 53% between March and April that year. Since these measures were lifted in early 2021, the numbers have steadily risen, reaching an all-time high of just over 302,000 in December 2023.”That’s when we began to see an increase again, primarily of Central Americans after mobility restrictions [there] and across the region began to ease,” said Ariel Ruiz Soto, a policy analyst at the Washington DC-headquartered Migration Policy Institute. “That’s also when the bigger change happened and we began to see much more diversified flows, starting with Venezuela, but also Colombia, Ecuador and places further away.”Migrants now come from as far afield as West Africa, India and the Middle East. Of migrants from outside the Americas, the greatest increase comes from China. More than 37,000 Chinese nationals were detained at the US-Mexico border last year, about 50 times the figure from two years ago. Global migration trendsThe increases in migrant figures seen at the US-Mexico border seen in the last several years also come at a time when, globally, migration to rich countries is at an all-time high. Statistics from the Organisation for Economic Co-operation and Development (OECD) released late last year show that 6.1m new permanent migrants moved to its 38 member states in 2022 – a 26% increase over 2021 and 14% higher than in 2019. The number of people granted asylum in the US doubled in 2022, driven in large part by migrants from Venezuela, Nicaragua and Cuba. The US is second only to Germany now in levels of humanitarian migration. “We are experiencing displacement around the world at a level never seen in recorded history, and people are turning up at our southern border for a variety of different reasons,” explained Jorge Loweree, managing director of programmes at the American Immigration Council, a Washington-based non-profit and advocacy group. “There are four failed states in our hemisphere alone.” More on the US border crisisHow TikTok fuels human smuggling at the US borderBiden cannot escape Trump’s shadow in border crisis Why Indians are fleeing halfway around the worldFleeing China for US – by trekking through a jungleFrom Trump to Biden The switch in the White House in 2021 also contributed, say some experts.A key message from President Trump, even if never became a reality, was the building of a border wall and increased deportations. The headlines created by the separation of children from their detained parents, decried by many as cruel, added to that impression.Under President Biden there was a change of tone and of policy. Deportations fell and “deterrent-focused” policies such as the rapid removal of migrants to Mexico and the building of a border wall ended. Migrants were paroled into the US to await immigration court dates – a process which can often take years. People trying to cross the border during this time told the BBC they thought that entering and staying in the US was going to be easier now. And human smugglers took advantage of a change in presidency to create a sense of urgency among migrants that they should hurry to the border.”Part of it is that they think they can just come. I think that’s just what they’re being told,” said Alex Cuic, an immigration lawyer and professor at Case Western Reserve University in Ohio. “They feel like there’s a pathway to come here,” he added. “It’s almost like an invite.”Conversely, some immigration activists have criticised the Biden administration and US lawmakers from both parties for failing to pass meaningful immigration reform. The last major overhaul of the system was more than 30 years ago under Ronald Reagan. 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