President González was making room in his government for political networks not originally part of Díaz's coalition, some of whom had been loyalists to Lerdo, including Evaristo Madero, whose grandson Francisco would challenge Díaz for the presidency in 1910. Important legislation changing rights to land and subsoil rights, and to encourage immigration and colonization by U.S. nations was passed during the González presidency. The administration also extended lucrative railway concessions to U.S. investors. Despite those developments, the González administration met financial and political difficulties, with the later period bringing the government to bankruptcy and popular opposition. Díaz's father-in-law Manuel Romero Rubio linked these issues to personal corruption by González. Despite Díaz's previous protestations of "no re-election", he ran for a second term in the 1884 elections.