WASHINGTON — New border-crossing rules that take effect in two weeks will mean longer lines and stiffer demands for ID, including for returning Americans, Homeland Security Secretary Michael Chertoff said Thursday.

A driver’s license won’t be good enough to get you past a checkpoint at the Canadian border, Chertoff said. That will be a surprise to many people who routinely cross the border, but Chertoff bristled at criticism that such extra security would be inconvenient.

“It’s time to grow up and recognize that if we’re serious about this threat, we’ve got to take reasonable, measured but nevertheless determined steps to getting better security,” he said in an interview with The Associated Press.

Thousands of people enter the U.S. through land crossings everyday. The biggest effect of the change will be at the Canadian border since it applies to both Canadians and Americans. Non-Americans coming in through Mexico already need extra documentation.

Congressional critics representing Northern border states were anything but impressed with Chertoff’s rhetoric.

His department has proved incapable of implementing a 2004 law on border security, and Chertoff “frankly has as much credibility on telling people to ’grow up’ as Geoffrey the Giraffe,” said Rep. Tom Reynolds, a Buffalo-area Republican.

First exit polls show even top presidential candidates are struggling to solidify appeal

WASHINGTON — John McCain and Barack Obama are struggling to win over their party’s most loyal voters, and no presidential candidate has a firm hold on what may be the campaign’s chief issue, the economy.

With the first presidential contests now history, voters appear to be telling the candidates: You still need some polishing.

People in Iowa, New Hampshire and Michigan made clear in exit polls that the top contenders have reasons to hope, but also weak spots to patch. Here are insights from the first rounds of voting, which have left neither Democrats nor Republicans with clear front-runners.

As his victory last week in New Hampshire faded into defeat in Michigan on Tuesday, exit polls for The Associated Press and the networks found that McCain has been unable to overcome the problem that cost him the 2000 nomination: a failure to win the GOP’s crucial conservative, religious and loyal party voters.

The Arizona senator did credibly with independents and moderates in Iowa’s Jan. 3 caucuses, finished a strong first with them in New Hampshire and prevailed again in Michigan. But his Michigan margins were modest, and far smaller than when he won the state’s 2000 primary.