Those Americans who support building a wall on the Mexican border edge out those who oppose it by a margin of 48 percent to 46 percent, according to a Rasmussen Reports poll.
The percentage of those who oppose the wall has increased significantly, however, since Donald Trump first proposed the idea in August 2015, when 51 percent supported it and only 37 percent were against, while 12 percent were undecided.
•	The wall is a sharply partisan issue, as 75 percent of Republicans want to build it, while 70 percent of Democrats oppose it. Among independents, 47 percent support the construction of the wall, while 44 percent are against it.
•	Almost two-thirds of likely voters (64 percenet) believe illegal immigration is likely to be greatly reduced during Trump’s presidency, while only 33 percent say such a reduction is unlikely.
•	Sixty percent of Republicans said illegal immigration was very important to their vote in the presidential election. Only 43 percent of independents and 19 percent of independents thought the same.
•	Among voters who strongly approve of Trump’s job performance, 92 percent want to build the wall. In contrast, 94 percent of those who strongly disapprove of the job the new president is doing oppose the construction of such a wall.
The survey of 1,000 likely voters was conducted on January 25-26, by Rasmussen Reports after Trump signed an executive order which set in motion the building of the border wall. The margin of sampling error is +/- 3 percentage points with a 95 percent level of confidence.