Will the gospel of the kingdom be preached again during the tribulation?
Yes. Jesus taught that the gospel of the kingdom will be preached again during the tribulation. The same good news He and the Twelve proclaimed will be proclaimed to every nation as a witness, and then the end will come, within a seven-year time frame.
Les teaches that the gospel of the kingdom is the good news that the King is coming and ready to set up His kingdom, which was being offered to Israel. Jesus and the Twelve had been preaching it for almost three years. Jesus used a future tense verb, saying this gospel of the kingdom shall at a future time be preached in all the world for a witness unto all nations, and then shall the end come. Les clarifies that many lift this verse out of context, but it is not the gospel of grace, which calls out a people for His name and will end. The tribulation will come in, and then the same gospel of the kingdom that Jesus preached during His three-year ministry will be proclaimed again during the tribulation. If that good news is proclaimed to every nation, the King is coming within just seven years.