Paul says that he believes that life begins at conception.
From Breitbart:
When Hannity asked him to clarify if he meant that he believes that life begins at conception, Paul answered, “I do truly believe that, but I also understand that there can be a range of opinions, and that to make life better, and to protect more life, I’m willing to go for all kinds of ‘in between’ solutions.
If he's talking about 'abortion', then that's one thing. If he's talking about legislation, then that's another.
I support legislation that forbids abortion after 20 weeks, but it means I'm acknowledging abortions that take prior to that. Some would say that it means I'm supporting them. I don't think that's the case. I'm using all means to limit as many as I can.