The leader of Tea Party Nation said he knows he will vote for presumptive GOP nominee Mitt Romney when he heads to the polls in November, but the idea gives him some serious heartburn.

“Is it time for conservatives to endorse Romney?” Judson Phillips said in an email to supporters. “Let’s put it this way. On Election Day, I am going to the voting booth. I will have a large and cold bottle of Pepto-Bismol in one hand and barf bag in the other. I will leave after voting for Romney, hoping I have not left the rancid dregs of what was once my breakfast on the voting machine.”

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Mr. Phillips said he encourages everyone to vote for Mr. Romney, while warning that they should do so “preferably on an empty stomach.”

He said he decision is based on the simple fact that the former Massachusetts governor is not President Obama. No matter what he does, he will not be as bad as Obama,” he said, before describing Mr. Romney as a “big government, liberal Republican” who is not going to cut taxes, not going to make deep cuts in federal spending and not going to make any serious reductions in the national debt.

Mr. Phillips endorsed former House Speaker Newt Gingrich for president in September. Mr. Gingrich dropped out of the race last week, after racking up millions of dollars in campaign debt.