紧急求助- Apply New TN after 140-approved？Appreicated!

请大家帮忙看一下我的case：

刚拿到140 approvel, 公司ask for relocate to east coast(can't stay in the company if not relocate)，找到一个新的工作，请问：

我去哪个border 拿到新TN 的可能性大？

I am in North Carlifornia bay area.

如果被拒，以加拿大护照入境，可以入关吗？ 担心一旦申请 New TN for new company got reject, can't reenter USA.

申请New TN after I-140 approved, 可行吗？

Thanks in advance, appreciated!