It's difficult to be sure from a single image, but I think the first one's a Tennessee Warbler. The lores look too dark for a Warbling Vireo to me. The whitish eyeline and distinctly dark cap also don't look right. The bill looks too pointy for a vireo, but that may be the camera angle.
My first impression was a really drab Red-eyed Vireo, but again, the bill looks too small.
BB