Callery Pear.

Looks like Carya cordiformis. Two things to look for would be alternate leaf arrangement and yellow winter buds.

please.. next time.. no more than 2 IDs per post.. first.. purple smoke bush.. planted about 8 feet too close to the fence .. second a red leafed japanese maple ... 3rd pic ... the last ones.. prunus ..which doesnt narrow it down much ... ken

It's definitely a shore pine and - although this example appears to be small-growing there in that spot - the species is genetically programmed to grow much bigger than this one is now*. Otherwise if you cut much more of it away it will have become pretty much half of a tree at that point. Already - except for the overhanging blob at the top - it looks like a flag. So I would suggest cutting it down to the ground now and being done with the matter. *The small heights repeatedly given in horticultural discussions of shore pine are presumably based on wild trees growing in particular conditions that limit growth. And not what is the norm for this tree, which in my area can sometimes even be seen growing nearly as tall as other native conifer species such as Douglas fir on the same (crowded) sites. Here's some ~2005 height records from Jacobson, Trees of Seattle - Second Edition (2006): Lincoln Park: 86 ft. Kubota Garden Park: 81 1/2 ft. U.W.: 62 ft. 46th Ave S & S Warsaw St: 65 ft.