Groups may rethink get-out-the-vote campaigns
Some say trade association CEOs near panic that Trump may win nomination
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Pawlenty among trade group CEOs backing Rubio for president
Departure of Jeb Bush from presidential race frees his supporters to back Marco Rubio, but Trump's momentum will be hard to stop
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Who spent the most on lobbying in 2015? Some highlights by industries
Total comes from nearly 600 trade and professional groups that file disclosure forms with Congress
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