Shifting a review process from one journal to another journal I have two articles under review. In first round of review both got decision of "minor revision" within 3-4 months. I submitted the revised version 5 months ago but since then the status of both articles is "Under Review". I sent follow up emails but always I got response from Journal Manager that the article is under review and he sent an email to Associate Editor to prompt the review process. 
During the course of time I submitted another two articles in IEEE journals; both were accepted and came online within 5-6 months of time. I am thinking to withdraw both under review articles form Springier and Elsevier and submit them to IEEE Journals. 
Is it possible to shift review history of those articles to IEEE?
Will it be helpful for further accelerating the review process in IEEE if I submit both articles as new submission and provide review reports as a supporting documents?
At this point, it will not be fair to the reviewers that are currently refereeing your paper to receive a notification that the paper has been withdrawn. 

Although you might think they are not doing their job properly, reviewers are busy persons and a lot of things can happen in the between. Given that 5 months is not that much time even fr a revision (at least depends on the fields. I my field of applied math/TCS it's OK) I would suggest to wait a little bit more but also bring the issue to the handling editor (which you already did).

On the other hand, even if you decide to withdraw, which is your right, I think that supplementing the current reviews to another journal is way off and I would strongly recommend against that. For start, the new journal would have no idea who is behind that reviews, not to mention the ethical levels of such action.