回复：说改签TN与I-140历史记录无关绝对是不对的.这里就有一个活生生的被拒签的实例,与楼主将要做的事很相似.

在你提供的链节案例当中,事主本人并未办过I-140,而是配偶办过.配偶办过I-140不应影响本人申请TN.
-If you carefully read the USCBP document I cited, you should find that the document addressed clearly that TN holder who merely has pending or approved I-140 is not considered to have immigration intent though this document was the response to the TN holder spouse's case. 

Read the second middle paragraph "After reviewing applicable law for ... (NAFTA ) applicants for admission, it is our determination that the mere filing or approval of an immigration petition does not automatically constitute intent of the part of beneficiary to abandon his or her foreign resident" .
This sentence can be interpreted as I-140 filing or approval is not considered as the evidence of immigration intent for TN applicants..

说改签TN与I-140历史记录无关绝对是不对的.这里就有一个活生生的被拒签的实例,与楼主将要做的事很相似.
When I subsequently tried to get a new TN in 2004, I was denied on the basis that a TN does not allow for dual intent and with an I-140 application (and now a PERM Labor Cert) on the record, I clearly have the intention to stay in the US.
http://www.justanswer.com/immigration-law/52zqt-tn-status-possibity-i-140-perm-record.html
-The case you cited here occurred in 2003-2004. The policy has been changed since 2008. I have known several TN holders have successfully renewed their TN I-94 at the US-Canada border even if they have pending/approved I-140.

所有跟帖： 

• 在你的举例中,移民局是说对有I-140的,不可以把门全部关死,要留缝.并不是说要180度敞开. -python2012- ♂ (281 bytes) () 02/13/2014 postreply 18:00:51

• 回复：在你的举例中,移民局是说对有I-140的,不可以把门全部关死,要留缝.并不是说要180度敞开. -863211- ♂ (725 bytes) () 02/13/2014 postreply 18:58:39

• 2008年次贷危机导致许多人失业，错在美方，移民局网开一面，只要有解雇信，不追究I-140。 -python2012- ♂ (149 bytes) () 02/13/2014 postreply 21:00:33

• 回复：2008年次贷危机导致许多人失业，错在美方，移民局网开一面，只要有解雇信，不追究I-140。 -863211- ♂ (622 bytes) () 02/13/2014 postreply 21:28:18

• 不是我的推测，而是移民法在实践中的应用。 -python2012- ♂ (765 bytes) () 02/13/2014 postreply 23:37:18

• 非常感谢两位对这个话题的讨论. 另有位网友dancerinbright也找到一个介绍, 从CN到GC的途径. -windwater1- ♂ (617 bytes) () 07/25/2014 postreply 12:48:04

• 读读这个： -快乐派对- ♂ (0 bytes) () 07/21/2015 postreply 18:12:21