Senator Lamar Alexander, Republican of Tennessee, wrote an opinion article in The Washington Post suggesting three ways out: Grant the president the $1.6 billion for border security that he requested, without wall funding, plus an additional $1 billion for security at ports of entry; approve a bipartisan bill linking wall funding with protection for young immigrants brought illegally to the country as children; or resurrect the 2013 comprehensive immigration overhaul that included huge increases in border security measures, sweeping changes to immigration law and a pathway to citizenship for the nation’s 11 million undocumented immigrants.