Yes, presidential candidate Ted Cruz uses his taxpayer-funded Senate office account to travel the country. It’s something of a time-honored American political tradition.

USA Today’s Paul Singer reported Thursday that Cruz (R-Texas) traveled for fundraisers and other political events and reimbursed himself from his official congressional bank account because he had some Senate business on the trip as well.  The week before, he found evidence that Hillary Clinton, as a New York senator running for president in 2008, did the same.

And President Obama, you’ll remember, got hit repeatedly in 2012 for mixing business with politics.

But as long as a politician proves there was official business on the trip, it’s completely legal to fit in some campaigning, too. Is it right? Maybe not. Is it normal? Absolutely.

We’re reminded of a lawsuit against the Carter White House in 1979 when Sen. Edward Kennedy’s labor supporters alleged that people in the administration were, among other things, using federal dollars for “travel expenses, costs of meetings and other political outlays.”

But even then such critiques were met with a yawn. “Such allegations have been made in connection with renomination or re-election campaigns of presidents down through history,” The Washington Post wrote at the time. The D.C. district court threw out the case for lack of standing.

D.C.-based lawyer Stanley Brand, who specializes in campaign law, had a similar reaction.

“This happens all the time,” he said. “It’s standard procedure because it’s logistically difficult to do any other way.”

There are perks to being a federal office holder running for president. The rub is that those same advantages also attract more scrutiny.