The most stark example of Mr. Sanders's problems with self-identified Democrats may be the Warren-to-Biden voters, people like Barbara Becker and Lisa Stone. These voters, many of whom are older Democrats and college-educated women, chose to support a candidate whose platform was a far cry from Ms. Warren's promises of "big, structural change," rather than a fellow progressive, Mr. Sanders — whom they admit they agree with on most policy matters.
The voters said that while they share many of Mr. Sanders's beliefs, they reject his political style.
"Biden is and always has been a collaborative worker — one who knows how to gather and draw on colleagues' expertise," said Ms. Becker, 73, a college professor in Chapel Hill, N.C. "Sanders is a do-it-yourselfer."
Ms. Stone, 63, an educator in Houston, said she "supported Warren because she was progressive but practical, and that's not what Sanders is."
Plus, Mr. Biden is, like her, a Democrat through and through. And Ms. Stone said that while she remained disappointed Ms. Warren did not perform better in Texas, the fact that the state went to Mr. Biden was some consolation.