Theater.
A bill can not “override” an EO unless it repeals its statutory authority. The authority for this EO comes from the Constitution and from statute, so Feinstein is out of luck.
Here’s a good backgrounder
http://www.nationalreview.com/article/444371/donald-trump-executive-order-ban-entry-seven-muslim-majority-countries-legal
Isn’t it amazing how uneducated these Senators are on the US Consitution? Just amazing to listen to some of these morons......