What is on the fence?

The phrase "on the fence" is an idiom used to describe someone who is undecided or ambivalent about a particular issue or decision. When someone is "on the fence," they have not yet made up their mind about which side of the argument or choice they support, and they are often weighing the pros and cons before making a commitment. This expression can be applied to various scenarios, such as political opinions, personal decisions, or any situation where a choice must be made between two or more options. The imagery evoked is that of someone sitting on a fence, able to see and consider both sides before jumping down on one.