Trump now has three straight victories - in the West, the South and Northeast.
Trump now has three straight victories - in the West, the South and Northeast.
Rubio racked up endorsements from prominent Republicans.
Rubio and Cruz argue that with roughly 70% of GOP voters consistently voting for someone other than Trump, they have an opening as the GOP field keeps shrinking.
And Bush had to tussle with Trump.
Bush took advantage of a policy-focused contest to detail positions on the economy.
Donald Trump is losing support, according to a CNN/ORC poll.
Trump's lack of experience with public policy was exposed throughout the second GOP presidential debate on Wednesday, a three-hour marathon that delved deep into complicated issues at home and abroad.
The Republican presidential hopeful said he would secure the boarder through more guards, fencing and air patrols.
The real estate developer unconventional approach to politics includes forgoing - so far - any substantive discussion of public policy.