Are the 144,000 Jews the same as the remnant left after the Tribulation?
No, the 144,000 sealed Jews are not the remnant left after the Tribulation. They are a totally different group. God seals these 144,000 young Jews at the beginning of the Tribulation, and they preach the gospel of the kingdom, while the surviving remnant is a separate group.
Les explains that when the Tribulation period began, God immediately sealed 144,000 young Jews. He emphasizes that they are not the remnant he was just describing; they are a totally different group. Their role is to take the gospel of the kingdom, the same gospel Jesus began in Matthew when He said the kingdom of heaven is at hand. The remnant discussed in the earlier survival calculations is therefore distinct from these sealed 144,000.