How can merger be good and bad for the market

A theory is, a merger of equals is where two companies convert their respective stocks to those of the new, combined company. However, in practice, two companies will generally make an agreement for one company to buy the other company's common stock from the shareholders in exchange for a common stock. Companies often get sold or merged in the growth phase, hopefully this helps you out.

yes, there are senators in each state

a big wall across the mexican border so no drugs, terrorist, or illegal immigrants can come through : )