Jeana, It is hard to tell from looking at the photo, but my gut feeling is that it might be powdery mildew. Texas A&M has a photo of powdery mildew on tomato foliage on their problem solver website and your photo reminds me of it, athough yours isn't as severe as the one in the photo at the TAMU Tomato Problem Solver website. I'm going to go find the photo and link it so you can look at it and compare it to your plant to see if you think what you're seeing on your plant does look like powdery mildew. Dawn Here is a link that might be useful: Powdery Mildew on Tomato Foliage

Last one.... thanks again

seysonn's response has image of early blight. OP's image is *not* early blight. Here's info from NCSU (see link) And here's a portion of NCSU info: "Infections of early blight usually begin when water splashes infected soil onto lower leaves or the stem. (The disease can also come on the plants from the garden center.) Soon afterwards, black spots develop that may be surrounded by a yellow area. The spots grow in size and number, spreading upwards towards the top of the plant. As the spots grow, they form a bulls-eye pattern. Lower leaves eventually wilt and fall off." Hmmm. Doesn't sound like OP's plants or symptoms. Here is a link that might be useful: early blight.

Pictures of the whole plant and the new foliage that is having trouble would be helpful. It could be a huge range of things based on your description, and the one close-up is hard to contextualize.