Obstruction?

[Panda Bear]

Couple of questions.

For our Canadian member, where apparently the situations of a fielder with ball a) tripping runner & b) pushing runner off base and tagging them are specifically addressed, you state the fielder can obstruct. I am assuming the response is 1.obstruction, 2. runner safe & placed on base pushed off? next base when tripped? USC treated as appropriate, after the obstruction award? Please clarify a little more.

In response to "Dakota"'s reply to Mr. Rowe, I agree with the spirit & intent of what Mr. Rowe says, that is the way it should be. But, as Dakota asks, do we have anything other than umpire's judgement and the spirit & intent of the game to specifically back it up?

I have already seen Big Betty pushing or otherwise removing Little Leah from a base and then tagging her, and the coach arguing a) runner was off the base [true] and b) asking what rule protects the runner in this case? Lacking a specific rule, I fear we may see this more often.