If you’ve been thinking that Rep. Ron Paul (R-Texas) has taken a lower profile of late in the GOP primary race, you’re not alone.

Let’s look at what Paul is – and isn’t – doing on the trail.

Two things Ron Paul isn’t doing: He’s not winning -- he has yet to place first in a primary or a caucus, either this cycle or last. And he isn’t making a lot of appearances on the campaign trail -- over the past week, he has held only three campaign events, while his rivals’ events have numbered in the dozens.

Four things Paul is doing: He’s appearing on late-night TV; he’s having a town hall at the University of Maryland in College Park on Wednesday; he’s holding what his campaign describes as a “giant” rally on Thursday at the University of Wisconsin in Madison; and he’s airing TV ads criticizing his rivals over last week’s Etch a Sketch incident.

What does it all add up to?

For Paul – who has never run a conventional campaign from the start – the prolonged GOP primary is an opportunity to continue to get his message out, slowly but steadily work his way up in the delegate count and potentially gain leverage for a key speaking spot at this summer’s Republican National Convention in Tampa.

Those are all good things not only for Paul, but also for his son, Sen. Rand Paul (R-Ky.), who may one day pursue a national bid of his own.

Here’s a closer look at today on the trail (Courtesy of candidate schedules and the PBS NewsHour Political Calendar; all times Eastern):

12:40 p.m.: Mitt Romney holds a campaign event in San Diego, Calif.

7 p.m.: Newt Gingrich delivers remarks in Hockessin, Del.

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