Immigration to the United States

If my I140 is approved and I leave the country and come back in few years, can I use my my I140 expecting that my current employer has withdrawn the application? [Knowledge Base] (1)
If quit my job with my i140 application pending. How do I know if my i140 application has been cancelled or is still in process? [Knowledge Base] (1)
Does changing jobs on an I140 need on to restart processing of the I140? Or can the new employer use the previous employer's I140 and wait until the dates are current? [Knowledge Base] (1)
Do I lose my priority date if I change jobs after getting an I-140 and my new employer does not file for a green card for two years? [Knowledge Base] (1)
Vote for MyImmiTracker on Product Hunt! [Immigration to the United States] (1)
FBI Summary Check Tracker [Immigration to the United States] (6)
CO asked for USA PCC, even when stayed for less than 1 year [Immigration to the United States] (2)