peter deucy and candidates using 21st century tan ticks to lay out their issues. the last time a clinton and bush campaigned against each other they bought tv ads. this time the campaigns are tangling on twitter. and it s bitter. at jeb bush and @hillary clinton are going at it on social media. using a microblog to land big blows. it all started with this clinton tweet showing a sky-high student debt stat that bush thought was misleading. so his team photoshopped a number of their own and replied. shortly after, more photoshop with hillary s handle giving jeb an f on college affordability. finally, bush took hillary s logo and flipped it so the arrow points where he thinks taxes are going if she wins. tonight in california, bush will point the finger at clinton and argue that isis exists because she was a weak secretary of state. saying quote isis grew while the united states disengaged from the middle east and ignored the