From the WashTimes comes "Bush plan on illegals dims hopes for agenda":

The Bush administration's stance on immigration, already the cause of a political split with some Republicans in Congress, is beginning to erode lawmakers' support for such presidential policy priorities as trade deals and extending the Patriot Act.

A handful of Republican lawmakers are citing the high rate of illegal immigration and the potential for an increase in foreign-worker visas as reasons to oppose the Central America-Dominican Republic Free Trade Agreement (CAFTA-DR), which is expected to be considered by the House this month.

And last month, 10 House Republicans sent a letter to Mr. Bush telling him that they "would have grave reservations about supporting any extension" of the USA Patriot Act unless Mr. Bush first agrees to specific steps to boost the Border Patrol and immigration law enforcement inland...

..."The question really should be: How much higher would illegal immigration be from Mexico had we not created millions of new jobs in both countries as a result of the economic growth of NAFTA?" [Christopher Padilla, assistant U.S. trade representative] said.

Even in the unlikely event that that were true, just because there's a pressure to illegally immigrate doesn't mean we would need to accomodate it like we have by leaving the borders porous.

In any case, an increase in illegal immigration is just one of the reasons to oppose CAFTA.

See "FAIR's Statement Regarding Proposed CAFTA Treaty":

...The negative implications of the CAFTA provisions for illegal immigration to the United States are likely to be caused by the same effects that have generated increased illegal immigration from Mexico under the North American Free Trade Act. As the 2000 Census revealed, the number of illegal immigrants from Mexico has increased substantially since the adoption of NAFTA, with no end in sight. Illegal immigration from Central America is already too numerous without adopting trade policies that will likely displace and motivate more subsistence farmers from that region to find seek illegally in our country...

And, see this from U.S. Rep. Ron Paul (R-TX):

...The quasi-judicial regime created under CAFTA will have the same power to coerce our cowardly legislature into changing American laws in the future... CAFTA will provide yet another avenue for globalists to impose the Kyoto Accord and similar agreements on the American people. CAFTA also imposes the International Labor Organization's manifesto, which could have been written by Karl Marx, on American business. I encourage every conservative and libertarian who supports CAFTA to read the ILO declaration and consider whether they still believe the treaty will make America more free.

...Like the UN, NAFTA, and the WTO, it represents another stone in the foundation of a global government system...

...CAFTA represents more government in the form of an international body. It is incompatible with our Constitution and national sovereignty, and we don't need it to benefit from international trade.

See also:
"CAFTA's Threats to U.S. Independence"
"USDA plants its own news" (pro-CAFTA press releases from the USDA that appear to be real news reports)
"CAFTA Should Be Rejected Just Like The EU Constitution"
"AP: U.S. Blocked Release of CAFTA Reports"
StopCAFTA.com
And, for the picture tells a million words version, see "Bush, Kissinger urge Congress to pass CAFTA"