I'm not an expert on the issue so the question might sound nonsensical to some, but the Watergate scandal is one of the most important events in US history and I would like to better understand Nixon's reasoning behind the break in.
Always more to add of course, but you might be interested in this thread about the exact same topic a couple of years ago;
In particular, this answer by /u/The_Alaskan gives quite a comprehensive overview. At their time of writing, they were of the opinion that there is no definite answer (yet).