Every week on eMarketer’s “Behind the Numbers” podcast, we take a few minutes to discuss some of the most intriguing headlines over the past seven days. This week, we’re talking about Twitter and Facebook’s day on Capitol Hill, plus the brouhaha over Nike’s new ad, an Instagram bid to get users buying, and more.

Brands taking stances on hot-button issues can be risky. But in an increasingly polarized political climate, some are courting controversy and can afford to alienate a vocal minority.

The share of consumers using mobile devices for retail purchases is lower in France and Germany than in several other nations in Western Europe. Yet together, the two countries will account for over $45 billion in mobile sales in 2018.