What does 1 Chronicles 13:2 mean?

He said, If you all agree, and if God is with us, let's send word to the rest of our people everywhere in Israel, including the priests and Levites in their towns, to come join us. 1 Chronicles 13:2 - Modern Text Bible

(David wanted everyone involved, not just his inner circle. He wanted to bring the whole nation together, especially the spiritual leaders.)