(Portland, OR) -- President Trump's border czar says federal agents are preparing to "flood the zone" in sanctuary cities, including Portland and Seattle. Tom Homan, the White House's enforcement director, warned that operations could lead to collateral arrests of immigrants not deemed criminal threats but living in the country illegally. The announcement comes weeks after Homan visited Portland's ICE facility. Mayor Keith Wilson responded that the city remains committed to its sanctuary status and will not assist federal immigration enforcement except when required by courts.