Rep. Tom Tancredo has scheduled a press conference tomorrow in Iowa, for what reasons no one's sure.

From Jonathan Martin:

Asked whether Tancredo intended to drop out of the race, his congressional spokesman, TQ Houlton, said he didn't know. But Houlton didn't affirm that Tancredo was staying in and directed calls to the campaign.

A campaign spokesman didn't immediately reply to an email or voice mail.

Tancredo will appear at the Des Moines Marriott tomorrow at 2:00 Central, according to the advisory.

Despite the fervor Iowa Republicans have over Tancredo's pet issue, immigration, the Colorado congressman has not seen a commensurate bump in the polls. And even though he's run a couple of provocative ads warning about the security threat of illegal immigration, his numbers have remained in the low single-digits.

Perhaps most notably, Tancredo's close friend, Rep. Steve King, passed over his colleague and threw his support behind Fred Thompson this week. King and Tancredo have worked closely on immigration and many in Iowa thought King would not endorse as long as Tancredo was in the race.

If he does drop out, the question then becomes whom Tancredo might endorse.