You could try and reschedule one of them, but im not sure how well it will go. They could be find about it, but on the other hand they might not.
Which job do you feel you have more chance of getting? Which job would you rather do?
Id stick with the interview for the one that you would rather have/think you have a higher chance of getting. Then try and rearrange the other one. If trying to rearrange that one doesnt go well then at least you have the one you kept (that you would rather have/have a better chance of getting) that you can fall back on if you get me.