Burnt Orange Report is an excellent resource for these kinds of questions.
So where do the 126 delegates come from? 126 delegates are "primary-chosen" delegates, allocated based on the results of votes cast on March 4. The 126 delegates that are allocated by the "regular" primary system will be the only ones that Senator Clinton and Senator Obama can add to their tally after March 4. These 126 delegates are divided based on the voting strength of each candidate in the 31 State Senate Districts across Texas.
They have an extensive series of reports/blog posts they have done about the delegate selection process. These reports are always available from the upper right hand corner of the home page.
http://www.burntorangereport.comBOR post by Phillip MartinEverything You Need To Know About the Texas Delegate Process, Part 1An Explanation of the 67 "Caucus-Chosen" Delegates(snip)
Here, now -- for those true political junkies out there -- is a summary of how the Texas caucus system works:
* 42 at-Large delegates allocated by the "caucus" system. The allocation of these 42 delegates (by candidate preference) is based on the presidential preference expressed state convention delegates (who are chosen at their precinct and county conventions) when they sign in at the state convention June 6.
* Also, 25 pledged "super delegates" allocated by the caucus system. The 25 pledged "party delegates" are party leaders, Democratic Mayors and Legislators. They are all allocated along the same lines as the delegates attending the State convention.
Go read the whole thing. It is worth your time.
And yes I would also agree with you on the second question. You have to follow though with it all the way to the State convention. The Texas Two-Step is a little misleading, but I understand why they did it that way. There will be so many thousands of people going to their PCT caucuses for the first time. It's sort of deceptive to let them think anyone can go on to national. Your chances are pretty low, especially if you don't understand all the rules. All of us that have been through this grinder at least once know, how competitive that process is. You have to commit a lot of time to campaign for those actual national delegate slots.
So the next best thing is to participate as much as you can, even if it means you're only voting to let someone else move up in the process. That helps your candidate too and it's worth your time.
Sonia