Left: US Republican presidential candidate Donald Trump reads the lyrics of Al Wilson's song "The Snake" during campaign event at Grumman Studios in Bethpage, New York April 6, 2016. Right: US Republican presidential candidate Ted Cruz speaks at his Wisconsin primary night rally in Milwaukee, Wisconsin, United States, April 5, 2016. [Photo/Agencies]

Additional analysis conducted using separate data shows that Democrats are more likely than Republicans -- especially Trump supporters -- to say they would vote for the "other" candidate in their party, should their preferred candidate lose the nomination, according to the survey.

Further, Republican enthusiasm has been waning over the past three months, and Republicans have become less likely to say the election process is working the way it should, Gallup found.

All of this doesn't bode well for Republicans in the general election, according to Gallup's analysis.

Republicans to date are clearly more fractured and certainly less positive about Trump and Cruz, the two leading candidates for their party's nomination.