She has that sewn up better than a San Francisco drag queens dress.
Not correct. To be elected Speaker, the nominee needs to have the support of a simple majority of the members of the House voting. That is, if all members vote, Pelosi would need almost all of the Democrats to win.
That's not true. She needs to have 1/2 of the votes of the entire House plus one. Ralph Hall voted for Hastert the year before he switched parties. The caucus does not elect the Speaker of the House, the entire House elects the speaker. All other positions are elected in the caucus'.
No, she needs a majority of the entire House to become speaker. There could be a Republican Speaker if enough Dems throw their support behind him/her.