The problem with these two are:
1. The expansion of executive power was one of the main traits of the previous administration. Pretty hypocritical to start pointing fingers now that this administration is using it. Perhaps Yoo can write a new episode on unitary executive power denouncing what he was defending just 4 years ago.
2. The DREAM act was re-introduced in 2009, 2010 (where it was heavily modified to appease to Republican demands, yet it was still filibustered) and 2011, where, again, Republicans withdrew their votes.
It's obvious that even if Republicans agree with immigration reform, they would rather not pass it on a Democrat administration, where it can be seen as a victory or triumph for the administration.
As scott pointed out earlier in the thread: