No crank no start

What is your question?

It's not cranking over, there's power, the alarm system won't shut off I have to disconnect the battery. Just a few weeks ago I had to jump start it a several times and it would start. The key has been sticking in the ignition as well. What could be the issue? Ignition relay switch? Can I bypass and connect a tractor ignition switch?

What makes this problem better or worse?

It's gradually been getting worse

How long has your 2005 Mercury Mariner had this problem?

A few weeks