The Daily Digest (Biden in town for Klobuchar, Santorum drops out, MN tax collections higher, Koenen wins special election)

Rick Santorum has suspended his presidential campaign. He did not endorse the likely GOP nominee, Mitt Romney during his speech or after it.

The move sets up the general election contest between President Obama and Republican Mitt Romney.

Romney says Santorum will maintain a key role in the GOP.

With Santorum out of the race, MNGOP Chair Pat Shortridge expects Republicans to rally around Romney's campaign.

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Social conservatives, however, aren't rushing to Romney.

Meanwhile, President Obama is making another push for the "Buffett rule."

President Obama raised $1.75 million during a Florida fundraising swing.

Former Gov. Tim Pawlenty paid off his debt and terminated his presidential campaign.

Race for U.S. Senate

Vice President Joe Biden is holding a private fundraiser in Minneapolis today for DFL Sen. Amy Klobuchar.

Economy

Best Buy CEO Brian Dunn resigned after the company did an inquiry on his conduct.

Stocks slumped on Tuesday.

Employers posted more job openings in February.

MMB says tax collections were $106 million higher in February and March than expected.

The growth of the U.S. labor force is slowing.

Vikings Stadium

Minneapolis Mayor R.T. Rybak faces a testy crowd at a forum on the Vikings stadium.

Congress

A new study says the federal health care law will add $340 billion to the nation's deficit.

GOP House Majority Leader Eric Cantor is reassuring lawmakers that he won't spend resources to try to beat them. Cantor is now saying it was a staff error that his campaign gave money to a super PAC that helped defeat a Republican incumbent. That super PAC is geared to unseat incumbents from both parties.

DFL Rep. Collin Peterson said the federal health care law "isn't all bad."

Race for Legislature

Rep. Lyle Koenen, DFL-Clara City, has won a special election to fill the Senate seat vacated when DFL Sen. Gary Kubly died in March.

Race for Congress

Minnesota businessman Jim Graves jumped in the race to challenge GOP Rep. Michele Bachmann. Listen to Graves speech here.

Bachmann is blaming Democrats for high gas prices. She held an event at a Lino Lakes gas station.

WCCO does a Reality Check on Bachmann's gas price claims.