WASHINGTON — Immigration has been a defining challenge of the Biden presidency, marked by record numbers of asylum-seekers and other migrants arriving at the U.S.-Mexico border. President Joe Biden pledged to modernize the nation’s immigration system and rebuild a refugee resettlement program that had hit historic lows under the previous administration. But despite issuing a record number of immigration-related executive actions — surpassing the Trump administration — Biden’s efforts drew criticism from both sides of the political spectrum. Critics on the right said the administration was being too lenient, while those on the left said it was too harsh. The
