The problem, about 30 *republicans*, otherwise known as RINOS from the northeast and midwest have jumped ship on this issue.
Does this list include our president?
Here is the White House Statement with regard to the House enforcement bill (H.R. 4437):
White house Statement on HR 4437
(the link is to a PDF so you need Adobe Acrobat)
The Administration strongly urges the House to pass this important legislation, and we look forward to working with Congress to ensure that certain provisions of the bill do not inadvertently affect operations designed to gain control of the border. The Administration remains committed to comprehensive immigration reform, including a temporary worker program that avoids amnesty, and believes this bill is a positive step toward that goal.
In other words, with the help of the Senate, they believe they can corrupt it into a shamnesty.