Border surge scrambles Senate immigration debate

President Biden's pledge to tackle immigration reform is running into a Senate buzz saw as upheaval at the border creates new gridlock in Washington.

Senators at the center of immigration discussions say they don't see a viable way to pass comprehensive reform anytime soon and that two smaller bills slated for House passage this week — help for "Dreamers" and farm workers — will be stuck in limbo upon arrival.

Looming over the debate is the Biden administration’s handling of a surge of migrants at the southern border, where the...