It's make or break time for Jeb Bush

Jeb Bush is entering a critical phase of his Republican presidential campaign, with top donors warning that the former Florida governor needs to demonstrate growth in the polls over the next month or face serious defections among supporters. The warnings, expressed by numerous senior GOP fund­raisers in recent days, come as Bush and an allied super PAC are in the early stages of an aggressive television ad campaign they say will help erase doubts about his viability. Party strategists said that Bush must find a way to recharge his campaign with a compelling message about his conservative governing record in Florida.