GETTYSBURG, Pa. — Bowing to the inevitable after an improbably resilient run for the White House, Rick Santorum quit the presidential race on Tuesday, clearing the way for Mitt Romney to claim the Republican nomination.

MESA -- Primed for a fight, Mitt Romney and Rick Santorum traded fiery accusations about health care, spending earmarks and federal bailouts Wednesday night in the 20th and possibly final debate of the roller-coaster race for the Republican presidential nomination.

MESA -- Primed for a fight, Mitt Romney and Rick Santorum traded fiery accusations about health care, spending earmarks and federal bailouts Wednesday night in the 20th and possibly final debate of the roller-coaster race for the Republican presidential nomination.

MESA -- Primed for a fight, Mitt Romney and Rick Santorum traded fiery accusations about health care, spending earmarks and federal bailouts Wednesday night in the 20th and possibly final debate of the roller-coaster race for the Republican presidential nomination.

A new survey shows Rick Santorum is within the range of a statistical dead heat of Mitt Romney with just a week to go to Arizona's presidential primary.

The attacks by his fellow contenders - Newt Gingrich, Jon Huntsman, Rick Santorum, and Rick Perry - on Republican presidential hopeful Mitt Romney for his successes at Bain Capital are disingenuous. The rivals are acting like Democrats. Romney's time at Bain epitomizes the type of success Republicans normally worship: financial self-improvement at the expense of the working man.

MESA -- The Republican candidates say more must be done to combat illegal immigration.

MESA -- The Republican presidential candidates are trying to avoid a debate on contraception and instead are looking to keep the focus of their criticism on President Barack Obama.