46-38 Clinton/Christie (was 41-42 in their last poll)
49-39 Clinton/Paul (48-41)
49-38 Clinton/Bush (48-39)
50-35 Clinton/Cruz (50-37)
The drop-off for Christie was 9%, while it was only 2-3% for the other Republicans.
Favorable Ratings:
51-40 Clinton (53-42)
33-30 Christie (was 47-23 before)
From January 15 - 19, Quinnipiac University surveyed 1,933 registered voters nationwide with a margin of error of +/- 2.2 percentage points. The survey includes 813 Republicans with a margin of error of +/- 3.4 percentage points and 803 Democrats with a margin of error of +/- 3.5 percentage points. Live interviewers call land lines and cell phones.
http://www.quinnipiac.edu/institutes-and-centers/polling-institute/national/release-detail?ReleaseID=1998