http://www.publicpolicypolling.com/main/republican-presidential-primary-2016/
Things also bode well for Rubio as the field gets smaller in the coming weeks. In a four candidate field he gets 32% to 31% for Trump, 23% for Cruz, and 8% for Bush. In a three candidate field he gets 34% to 33% for Trump and 25% for Cruz. And in head to heads he leads both Trump (52/40) and Cruz (46/40). As other candidates drop out of the race Rubio is the most likely destination of their supporters.
Your article is dated 2/4, before the NH debate. We’ll see if Rubio can recapture momentum.
For every candidate, Cruz is the top "second choice" (JAN 7)