"As a part of immigration reform, the Administration strongly supports legislation to attract and retain foreign students who graduate with advanced STEM degrees, to establish a start-up visa for foreign-born entrepreneurs to start businesses and create jobs, and to reform the employment-based immigration system to better meet the needs of the U.S. economy. However, the Administration does not support narrowly tailored proposals that do not meet the President's long-term objectives with respect to comprehensive immigration reform."
Essentially this bill "converts" the 55,000 "diversity visas" currently available into "STEM visas."
It looks like this bill originated from the Republican party, so I'm wondering why they didn't just write a bill that allocated additional STEM visas without "cannibalizing" the diversity visas.