A Look At Rubio's And Bush's Progress From The N.H. Campaign Trail

On Thursday in New Hampshire, Democrat Bernie Sanders, as well as Republicans Marco Rubio and Carly Fiorina, are expected to file their formal paperwork to run in next year's primary.

The headlines among the GOP this week in New Hampshire are Rubio's rise in the polls, Donald Trump back on top of polls, and Jeb Bush's campaign reboot.

WBUR's senior political reporter Anthony Brooks followed a couple of the GOP candidates on Wednesday and reports for Morning Edition on the mood around the campaigns of Rubio and Bush.