A Question About Embryonic Stem Cell Research

Given these two recent posts (here and here), I am puzzled.  Can someone--anyone:  Robby George, Rick Garnett, anyone--help me solve the puzzle.

Let's assume that we agree with Louis Guenin--as of course both Robby George and Rick Garnett do--that "[i]f you and I are human individuals, so too are early embryos."  We can nonetheless reasonably disagree about whether embryos created in the course of IVF may be used in embryonic stem cell research.  Robby and Rick are of the view that IVF embryos may not be so used.  Guenin and others are of the view that IVF embryos may be so used.  This is a reasonable disgreement among persons who agree that "[i]f you and I are human individuals, so too are early embryos."  For Guenin's position, click here.

HOWEVER, one who agrees that "[i]f you and I are human individuals, so too are early embryos" cannot, as I see it, support therapeutic cloning.

So why would any large organization many of whose members agree that "[i]f you and I are human individuals, so too are early embryos" (e.g., the Democratic Party) want to support therapeutic cloning rather than support just the use of embryos created in the course of IVF?  Supporting the former rather than just the latter seems so unnecessary.

That's my puzzle.

Robby, Rick, anyone:  Can you help me understand?
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