Democratic Arizona Sen. Ruben Gallego is wading into one of Washington's most contentious and intractable political problems as he puts forward a plan Monday aimed at reforming the country's immigration system and beefing up border security. The plan by Gallego, who beat Republican Kari Lake in last fall's tight Senate race, calls for hiring more Border Patrol agents; using technology to stop fentanyl smuggling; reforming the asylum system; adding more ways for people to come to the U.S.; and a pathway to citizenship for some immigrants. Gallego's plan comes three months into President Donald Trump's administration as Trump seeks to deliver on campaign promises of carrying out mass deportations.