YES!!!!!!!
“BREAKING: CNN reports that the Trump administration is preparing a draft proclamation to declare a national emergency on the southern border that identifies $7+ billion for the border wall.”
$5.7 billion was slated to build 234 miles of the most expensive, difficult and important miles of the border - essentially the rest of the Rio Grande Valley, 55 miles around Laredo, and about 75 more miles across the urban areas along the border.
The massive flood levee walls in the Rio Grande Valley with all the bells and whistles (which would be largely completed with that funding) run as much as $24 million per mile. Out in the flat desert, 18 foot bollards with just patrol road and a few cameras/sensors, can be as little as $4 million per mile. The urban bollards with with a lot of extras might run around $10 million.
So the extra $1.3 - $1.8 billion beyond that $5.7 which has already been detailed, would likely build another 150 miles (possibly as much as 300-400).
So the 120 already built or contracted, plus the 234, plus the 150 would be around (conservatively) 400 miles (up to as much as 500-600) of high end effective barrier where it is most needed.
It would be a significant piece of work indeed, that will make a big impact (but not achieve full operational control of the whole border, which is the 5 year, $25 billion program).