The pre-election effort by congressional Republicans to show they're serious about cracking down on illegal immigrants is continuing on both sides of the Capitol.
The Senate continues to debate a proposal to erect 700 miles of double-layer fencing along the nation's border with Mexico.
The Senate action is an acknowledgment that any effort at reaching a comprehensive immigration reform bill is dead for the year.
The House, which has already passed the fencing bill, Thursday focuses on cracking down on smugglers who would bring illegal immigrants into the US.
One bill increases the penalties for building or using tunnels under the border.
Another proposal makes it easier to detain and deport criminals and gang members who aren't citizens.